One of the most common outcomes in Elasticsearch is a failed search—that is, the user not getting the desired result from the search. There are many reasons for this; for example, it may be due to the analyzer used for the search. The standard analyzer will break the search term into individual components (for example, ecological footprint will become ecological and footprint). The term used in the search will not be used for indexing.
Another reason for failed searches might be the incompatibility of the search term with the analyzed text. Note that some queries perform text analysis automatically. Failed searches might also occur because the standard analyzer is performing stop word removal on words such as the and it. Another cause could be the difference between the match query and query strings that process the text; a match query...