Perhaps you should try some spelling variations:
concurrent challenges » current challenges, concurrent changes, concerns challenges
wang liang » wang yang
wong yue » wang yue, hong yu
1 young » 15 young, 10 young, 11 young
young a » young _, young 4, young 5
yue 3 » vue 3, yue _
yang » 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 liang) or (yang di))wong yue 3 concurrent challenges 1 young a ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((wang liang) OR (yang di))wong yue 3 concurrent challenges 1 young a ;.
• Adding a wildcard symbol may retrieve word variants: ((wang liang) or (yang di))wong yue 3 concurrent challenges 1 young a ;*.