Examine your spelling. Increase the scope of the Proximity control. The ranking algorithm takes into consideration relative word ordering, word proximity, database frequency, document frequency, and position in text. Letter cases will be ignored. Applying Search Logic Texis and Metamorph use set logic for text queries.
Set logic is easier to use and provides more abilities than boolean.
The examples below make reference to single keywords, but keep in mind that each keyword can represent an entire list of things or any of the special pattern matchers. In the examples below, you could replace any of the keywords with a list like this. This may be confusing at first, but it is very powerful. If improperly used these pattern matchers can slow queries. The Word forms options give you control over how many variations of your query terms will be sought in your search.