Perhaps you should try some spelling variations:
teaching china » teaching doing
crash teaching » death teaching, rich teaching
china hubert » china hubei, l'inra hubert, china expert
tan yang » dan yang, tan ying, tan yong
hubert n » shubert j, robert n, albert n
jie die » wie die, eine die, jie lien
die die » wie die

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tan yang ((jie die) OR (die die)) crash teaching china hubert n ;~.
• Adding a wildcard symbol may retrieve word variants: tan yang ((jie die) or (die die)) crash teaching china hubert n ;*.