When SearchJob.WantResultsAsFilter is true, only output search results information to the output search filter and do not create a SearchResults object or call the OnFound callback function when documents are found. This can make generation of a SearchFilter significantly faster.
Rank documents higher when hits are closer to the top of the document and when hits are located close to each other within a document. This improves relevancy ranking for "all words" and "any words" searches. See Relevance in the Overviews section.
When selecting the documents to return (up to the MaxFilesToRetrieve limit in the SearchJob), select the most recent documents rather than the best-matching documents. This flag cannot be used with dtsSearchDelayDocInfo, because the document date for each document is needed.