Unable to search Email for Chinese

Good day
Could I ask why most emails cannot be searched in Chinese,even if it contains Chinese.
Thanks

It may be you don’t have the correct fields and folders selected.

Choose the most inclusive ones from the drop-down options in the search box before you begin the search. Also, disable the server search as that may not be working.

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Dear Gary
Acctually I have select all folders and all items/use server search in the searching option and I don’t have the include Archiver Folders option.
Thanks