Perhaps you should try some spelling variations:
learning tom » learning tim, learning tool, learning tony
amin zhong » amin hong, min hong
wang yang » wang yan, wang liang, wang yanling
yang amin » yang jin, yang lin, yang mind
zhong tai » hong tan, hong hai, zhong zhi
h wang » _ wang, x wang, l wang

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang ((learning tools) or (((learning tom) OR (learning time)))) h wang yang amin zhong tai ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang ((learning tools) OR (((learning tom) OR (learning time)))) h wang yang amin zhong tai ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang ((learning tools) or (((learning tom) OR (learning time)))) h wang yang amin zhong tai ;*".