@LAXlocal, you can add cities to help narrow your search and filter unwanted result.

Secondly, i donot suggest adding price range when making research b/c most travel search engine's can set-up promotion offer's with low price just to entice customer's.

Infact, i suggest doing this manually directly on the homepage of a specific travel site. Because doing so directly from google will only yield what we call promotional offer (price quotation) the actual price for a given destination changes when you land on the homepage of the travel site.

NOTE: Below are other travel researching tool. They are very popular tool's but, may be unknown to many traveller's:
booking buddy & Hotel combine

The 1st is for research of cheap flight while the 2nd tool is used to check & compare available room's and prices from major travel search engines including expedia


Thanks