Here's a simple keyword building technique I use to find the
maximum possible variations of a keyword phrase. I use it
predominantly for bidding on keywords at Google Adwords, however
it can also be very useful for building lists for use in search
engine optimization.

For example let's use the phrase "horses for sale". Here's how
the various permutations of this keyword phrase would look. I use
the free Keyword Tumbler tool for doing this. ADDRESS:
http://www.keywordtumbler.com

horses for sale
horses sale for
for horses sale
for sale horses
sale horses for
sale for horses

As you can see there are a maximum of six possible ways a three
word phrase could be entered into a search engine.

Now you need to find out if these permutations are actually being
searched for. This is where the Wordtracker service comes into
its own. You can get a free trial over at
http://www.keywordlistbuilder.co.uk.

Go to Wordtracker now and in the "Keyword Universe" choose the
database called "Precise".

Then in the right hand panel enter the six different keyword
combinations, and hit the "Proceed" button.

Wordtracker now tells us that out of our six combinations, two of
them appear in its database (NOTE: at the time of writing it
did). They are...

horses for sale
for sale horses

You might be thinking that you could have figured this out for
yourself. But its vital that you understand you need to stop
second-guessing markets and users behaviors based on your own
opinions and assumptions. Use these tools like Wordtracker to
actually tell you how the markets are behaving.

I have sometimes found three and four phrase permutations using
this method. Phrases that to me appeared "stupid" if entered in
the search engines... but someone, somewhere is doing it! This
why you need to do this step and NOT guess the permutations.

Also searchers sometimes enter a keyword phrase using the "space"
and the "+" sign. E.G. "1 2 3" can be entered in as "1+2+3" and
also "1 +2 +3". This is great tip if you want to use your keyword
lists on Google Adwords.

So taking our example keyword phrase let's see how many
permutations we can now generate.

horses for sale
for sale horses

horses+for+sale
for+sale+horses

horses +for +sale
for +sale +horses

Now let's use misspellings to come up with even more keyword
combinations. A great tool for this is Misspelled Keywords
available at http://www.misspelledkeywords.co.uk.

Simply enter "horses for sale" and select from six ways to find
misspellings. Dictionary lookup, keyboard mistakes, trim
first/last character, swap character, double characters, and...
add 's' ending.

For this example I only selected the "dictionary lookup" and
"keyboard mistakes". The tool returned 1360 possible misspelling
combinations. If I'd used all the selections, it would have come
back with over 8500. Just for one phrase!

Now let's enter these misspellings into Wordtracker's Precise
database like we did above. The results? Wordtracker returns the
following (NOTE: at the time of writing):

horses foe sale
horses fpr sale
horses for sail
horses for slae

Which now get turned into twelve new terms:

horses foe sale
horses fpr sale
horses for sail
horses for slae

horses+foe+sale
horses+fpr+sale
horses+for+sail
horses+for+slae

horses +foe +sale
horses +fpr +sale
horses +for +sail
horses +for +slae

Finally you are going to want to join the words together, so
"horses for sale" becomes "horsesforsale", and yes this appeared
in the Wordtracker database.

Using the method of keyword generation outlined above, what
started out as one keyword phrase, "horses for sale" has now
turned into 19 keyword phrases you can use on Google Adwords.
Phrases that are actually being used by surfers in the search
engines.

So there you have it, how to build adgroups which are TIGHTLY
focused on the keyword phrase you are wanting to bid on. 

Rob Taylor has been marketing online since 1996. He's sold
anything from books, debit cards, security products to art
prints. Take advantage of his battle tested marketing strategies
that could quietly make you five figure cash profits every single
month. Free newsletter subscription at http://www.megastep.com