4. The system of claim 3 , wherein, when a noiseless phrase search is performed, each keyword position is adjusted by the number of noisy keywords preceding the keyword.
3. The system of claim 1 , the computer readable medium further storing instructions that, when executed by the processor, further causes the processor to: receive a search query, wherein the search query includes at least one search phrase; receive, for the at least one search phrase, an indication from a user specifying to perform one of a noisy phrase search or a noiseless phrase search; process a search using the at least one search phrase, wherein the search can be performed as a noisy phrase search or as a noiseless phrase search; and output a search result.