Perhaps you should try some spelling variations:
challenges deaths » challenges data, challenges ideas, challenges dealing
2 assessment » 3 assessment, 4 assessment, 1 assessment
deaths among » rates among
among tai » among team, among a, among di
yang xi » yang di, yang yi, yang jui
ng a » lng a, ngo a, png a
wang » wing, wan, lang

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((wang yan) or (yang xi))ng a 2 assessment challenges deaths among tai ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((wang yan) OR (yang xi))ng a 2 assessment challenges deaths among tai ;*.