Perhaps you should try some spelling variations:
teaching china » teaching doing
crash teaching » death teaching, rich teaching
china robert » china hubert, china expert, china recent
tan yang » dan yang, tan ying, tan yong
robert n » robert _, robert e, robert j
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.

• The words AND, OR and NOT may confuse the search; try adding quotes: "tan yang ((jie die) OR (die die)) crash teaching china robert n ;~".
• Adding a wildcard symbol may retrieve word variants: tan yang ((jie die) OR (die die)) crash teaching china robert n ;*.