This sounds like stemmed words (common variations of a word) displayed on the serps page. It's common for these stemmed words to be displayed for pages in the serps that still satisfy the exact query.
Generally, Google satisfies exact matches (for a word) first, and stemmed variants don't start showing up predominantly until further down in the serps.
It may be that...
- exact matches for your exact search phrases are rare enough that Google is showing pages with lots of stemmed variants in order to satisfy your query...
- in your searches the pages that satisfy the exact query also contain lots of stemmed variations, which are highlighted in the serps...
- or, Google has the stemming knob of its algo turned way up.
Are you unhappy with the pages returned (ie, do they not satisify the exact query?), or are you unhappy with the serps highlighting?
