It looks like all your keywords are long tail keywords. The best thing to do is read this for info: http://www.digitalpointads.com/2011/06/understanding-keyword-bids/
try out different versions of your ads and look at your analytics to see what's going on and what you can do to improve
I think before doing ads you should do some competitive analysis for other ads on the digital forum and check how they using keywords and also use keywords tool for good keywords. May be this will help you.