Perhaps you should try some spelling variations:
present challenges » current challenges, assessment challenges
challenges cases » challenges case, challenges caused, challenges crises
cases among » rates among, costs among, uses among
2 present » _ present, 3 present
among tai » among team, among a, among di
yang xi » yang di, yang yi, yang jui
lng a » lng _, leg a, lpg 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))lng a 2 present challenges cases among tai ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((wang yan) OR (yang xi))lng a 2 present challenges cases among tai ;*.