Yes. To limit your results to those where two or more words appear together as a phrase, type the words in a single search box within quotation marks. You will still see results with both singular and plural versions of any nouns in the phrase. For example, typing “green tomatoes” will return results with both green tomatoes and green tomato in them.
If you type two or more words in a single search box without quotation marks, those words will not be tethered to each other; instead, each can appear anywhere in a record. However, if you rank your results by relevance, the results where the words appear as a phrase in the title field will appear at the top of the list.