Perhaps you should try some spelling variations:
teaching a » teaching _, teaching aids
china does » china goes, china des, child does
tan china » tuan china, than china, can china
dong tin » dong ping, dong di, dong liu
dong bin » dong di, dann bin
wang hui » wang hua, wang zhi, wang wei
a 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: ((((dong tin) or (dong sin))) or (dong bin)) tan china does teaching a wang hui ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((dong tin) OR (dong sin))) OR (dong bin)) tan china does teaching a wang hui ;.
• Adding a wildcard symbol may retrieve word variants: ((((dong tin) or (dong sin))) or (dong bin)) tan china does teaching a wang hui ;*.