Why don advanced queries behave normally?
Stemming does not change how advanced queries work. But, it must be taken into account because Coveo Enterprise Search looks for stems rather than terms. Here are two examples: In the index, some documents contain either “consumers” or “consuming”, others contain “consumers” but not “consuming”. Yet, when querying for “consumers NOT consuming”, there are no results. Why? The reason is quite simple. The query terms are both stemmed to “consum-” so Coveo Enterprise Search interprets the query like this “consum- NOT consum-“. Evidently, this leads to no result. The exact match string “shipped products” can return documents containing “[] this ship products steam []” because Coveo Enterprise Search looks for exact matching stems: “ship- product-“.
