Perhaps you should try some spelling variations:
lasten teaching » based teaching, stem teaching, content teaching
teaching change » teaching chinese, teaching chapter, teaching china
robert bin » robert b, robert n
ran ying » fan ying, tan ying, jin ying
robert i » robert _, robert e, 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 change ((robert bin) OR (robert i)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ran ying ((di die) or (ii die)) lasten teaching change ((robert bin) OR (robert i)) ;~".
• Adding a wildcard symbol may retrieve word variants: ran ying ((di die) or (ii die)) lasten teaching change ((robert bin) OR (robert i)) ;*.