Perhaps you should try some spelling variations:
challenges min » challenges making, challenges moving, challenges ramina
a assessment » 3 assessment, 4 assessment, 1 assessment
challenges m » challenges 1, challenges 3, challenges 5
hyoung hai » hong hai
wang yang » wang yan, wang liang, wang yanling
yang xi » yang di, yang yi, yang jui
ong ye » ong yew, wong yue, wong yee
ye a » yet a, e a, me a

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((wang yang) OR (yang xi))ong ye a assessment ((challenges min) OR (challenges m)) hyoung hai ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((wang yang) or (yang xi))ong ye a assessment ((challenges min) OR (challenges m)) hyoung hai ;~".
• Adding a wildcard symbol may retrieve word variants: ((wang yang) or (yang xi))ong ye a assessment ((challenges min) OR (challenges m)) hyoung hai ;*.