As for any bio-entiity information retrieval triage, as DR suggests, you can start with PubMed as having the highest specificity for papers (if they use the same term). But you can then consolidate with NCBI all dbs (which includes not onlly dbs and Books but also PMC indexing not in PubMed). Google Scholar, then Open Google (while this is the least efficient, on a particularly good day you might match journal text scraped from behind the publishers firewall but not in PM or PMC). The order of this is not realy important and you should also try the EBI open search.

Note also for any moderate-size sequence entity (e.g. an nc-RNA) you will need to perform database searches with that sequence

If you want specific information about something, then search for it in pubmed.