Yes. If you are search for "See Jane run", with quotes on two pages, then a page that mentions Jane and running a lot will be ranked higher than the page that doesn't. This is true even if the exact phase appears only once on the two pages.
We designed Zoom to search for words and numbers. We didn't really design it to search for the string of punctuation used in chemical names. You might find that in the end that some custom development is required to get the result you want.