Well, if you search only in an open file (via CTRL-F), then no, you cannot select everything.
However, if you use the advanced search (CTRL-H, then go to the βFile Searchβ tab), you can enter a search template, as well as a file name template for the files where it should be searched, and when the search is performed, the search terms are highlighted in each file where they were found:

Shivan Dragon Sep 06 2018-12-12T00: 00Z
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