Perhaps you should try some spelling variations:
present challenges » current challenges, assessment challenges
a present » _ present, 3 present, 2 present
wing yan » wang yan, wing ian, wing tan
ji zhong » 2 zhong, wu zhong, yu zhong
yang xi » yang di, yang jui
yang yi » yang di, yang jui
ji hong » kia hong, thi hong, tin hong
ng a » lng a, ngo a, png a
a a » a la

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((wing yan) or (((yang xi) or (yang yi))))ng a a present challenges ((ji hong) OR (ji zhong)) hai ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((wing yan) OR (((yang xi) OR (yang yi))))ng a a present challenges ((ji hong) OR (ji zhong)) hai ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((wing yan) or (((yang xi) or (yang yi))))ng a a present challenges ((ji hong) OR (ji zhong)) hai ;".
• Adding a wildcard symbol may retrieve word variants: ((wing yan) or (((yang xi) or (yang yi))))ng a a present challenges ((ji hong) OR (ji zhong)) hai ;*.