Perhaps you should try some spelling variations:
lasten teaching » stem teaching, content teaching, related teaching
based teaching » based testing, based training
chinese robert » chase robert
ran ying » fan ying, tan ying, jin ying
robert e » robert _, robert j
di die » die die, vi die, xi 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: ran ying ((di die) OR (ii die)) ((lasten teaching) OR (based teaching)) chinese robert e ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ran ying ((di die) or (ii die)) ((lasten teaching) OR (based teaching)) chinese robert e ;~".
• Adding a wildcard symbol may retrieve word variants: ran ying ((di die) or (ii die)) ((lasten teaching) OR (based teaching)) chinese robert e ;*.