Perhaps you should try some spelling variations:
content teaching » context teaching, content matching, content teachers
lasten teaching » based teaching, stem teaching, related teaching
chinese robert » chase robert
robert bin » robert b, robert n, robert i
tan ying » fan ying, ran ying, tan yang
ying di » yang di, ying jin
di die » die die, ii die, vi 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 ying di die ((lasten teaching) OR (content teaching)) chinese robert bin ;~".
• Adding a wildcard symbol may retrieve word variants: tan ying di die ((lasten teaching) OR (content teaching)) chinese robert bin ;*.