These commands can only be accessed after you enable support for Asian languages in LibreOffice - PreferencesTools - Options - Languages and Locales - General.
བརྡ་བཀོད་འདི་འཛུལ་སྤྱོད་འབད་ནི་ལུ...
Choose LibreOffice - PreferencesTools - Options - Languages and Locales - Searching in Japanese.
མཉམ་པ་སྦེ་བརྩི་འཇོག་འབད།
Specifies the options to be treated as equal in a search.