Perhaps you should try some spelling variations:
challenges using » challenges during, challenges arising, challenges facing
a assessment » 3 assessment, 4 assessment, 1 assessment
using hyoung » using your, wang hyoung, using ground
hyoung hai » hong hai
wang yang » wang yan, wang liang, wang yanling
yang yi » yang di, yang xi, yang jui
ng m » g m, n m, ng _

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((wang yang) or (yang yi))ng m a assessment challenges using hyoung hai ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((wang yang) OR (yang yi))ng m a assessment challenges using hyoung hai ;.
• Adding a wildcard symbol may retrieve word variants: ((wang yang) or (yang yi))ng m a assessment challenges using hyoung hai ;*.