RemoveWordsIfNoResults

Strategy for removing words from the query when it doesn't return any results. This helps to avoid returning empty search results. - none. No words are removed when a query doesn't return results. - lastWords. Treat the last (then second to last, then third to last) word as optional, until there are results or at most 5 words have been removed. - firstWords. Treat the first (then second, then third) word as optional, until there are results or at most 5 words have been removed. - allOptional. Treat all words as optional. For more information, see Remove words to improve results.