Hi @Gnanamuthu Just a quick comment it will certainly match
{"query":{ "match": "couchbase", "field": "tags" }}
The token “couchbase” is not split into two words. Perhaps you want a Regex (note the syntax is golang)
{"query":{ "regexp": ".+base", "field": "tags" }}
The above should work for you if you are using the default analyzer. For more details on RegEx search queries you can look at this post: FTS matching an exact word of a format "aaaa:100@143" - #7 by flaviu
I hope this helps
Best
Jon Strabala
Principal Product Manager - Server