Only documents that contain all words from your search request are shown. The more words you put in your search request, the more precise the search becomes.
Use double quotes to search for an exact phrase. This eliminates documents where the words occur but are not next to one another or are in the wrong order.
Use the "+" operator to search for the exact word in a document. This operator also allows you to search for link words (like "the", "a", "of", "or", "and") which are ignored by default.
The "OPT" operator allows you to specify a term without making its presence mandatory for a document to appear in the search results.
The "-" operator allows you to remove all documents containing a specific word or expression from the search results.
The "NEXT" operator finds documents where the query terms are next to each other.
The "NEAR" operator finds documents where the query terms are all in a short range of words.
The "AND" and "OR" operators can be combined to match documents against advanced boolean logic.