With the LinkedIn consumer search engine, we place a limit on the amount of Boolean search operators used in a single query. We do this to keep our free search engine operating as quickly as possible and to provide relevant results. By limiting the number of Boolean operators, we also secure our members by deterring profile scraping.
Our Recruiter, and Recruiter Lite offerings have no limit on the number of Boolean operators you can use in a single search query, as these products are built for professional search users. For Sales Navigator, you can use a maximum of 15 Boolean operators in a single search query.