i don’t speak English. Sorry for suggesting through a translator
The suggestion is to create your own list and use it in conjunction with 'Always show search suggestions' under 'Enable search history'.
In the same way as a bookmark, if you create a group called 'apple=apple|mango|berry' and search for 'mango', the results of 'apple, berry, mango' are output. After this you will see search suggestions
I will consider an option to add to your search history from within the Everything user interface.
Thank you for your suggestion.
For now, please try the following:
Exit Everything (File -> Exit)
Open your Search History.csv in "%APPDATA%\Everything" with Excel.
Add your new search to the end of the list, set the search count to a high number and leave the last search date blank, for example:
"apple|mango|berry",9999