Perhaps you should try some spelling variations:
doubt teaching » about teaching, does teaching, drum teaching
teaching jia » teaching jiao, teaching a, teaching job
tan china » tuan china, than china, can china
dong tin » dong ping, dong di, dong liu
dong bin » dong di, dann bin
jia fang » xia fang, jia zhang, jing fang
fang wei » wang wei, zhang wei, liang wei

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 doubt teaching jia fang wei ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((dong tin) OR (dong sin))) OR (dong bin)) tan china doubt teaching jia fang wei ;.
• Adding a wildcard symbol may retrieve word variants: ((((dong tin) or (dong sin))) or (dong bin)) tan china doubt teaching jia fang wei ;*.