Perhaps you should try some spelling variations:
teaching chinese » teaching china, teaching case, teaching cases
teaching change » teaching chapter, teaching china, teaching case
time last » time list, time past, time lost
roberto e » robert e, roberto n, roberto f
tan ying » fan ying, tan yang, tan yong
ran ying » fan ying, jin ying, gao ying
di time » ii time, i time, dido time

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 ying) OR (ran ying)) di time last ((teaching change) OR (teaching chinese)) roberto e ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tan ying) or (ran ying)) di time last ((teaching change) OR (teaching chinese)) roberto e ;~".
• Adding a wildcard symbol may retrieve word variants: ((tan ying) or (ran ying)) di time last ((teaching change) OR (teaching chinese)) roberto e ;*.