helenp - 8:51 am on Feb 12, 2013 (gmt 0)
Add negative keywords like:
This will exclude the unwanted keywords.
or set the brackets:
[buy motorbikes london]
to ensure that only exact matches will cause impressions.
Negative is a good idea, howeer they will be many and odd words.
The quotes as I understand wont display buy blue cars in london if I have keyword buy cars london.
As far as I can read in google support the best should be to use the + for example like this
buy +cars +London as cars and london is a must in the phrase, I will wait some days to see if it will be better as there always are bad days.