Help with WordPress search function

Hello,
Ive set up a wedding magazine through WordPress and im having some trouble with my search function.
As the post are made up of image adverts theres nothing for the search function to look for, So i have it set up to search the tags.
It works when you search for one item say “photographer” but when i want to search for “photographer middlesex” it comes up as nothing found even though both those are listed in the tags of a post.
If some one knows of a way to get this work the help would be amazing 🙂
you can see the site at http://www.weddingsandoccasions.org.uk/
Thankyou in advance for any help given 🙂