Perhaps you should try some spelling variations:
teaching chinese » teaching china, teaching case, teaching cases
chinese roberto » change roberto
roberto bin » roberto n, roberto bola, roberto luis
time last » time list, time past, time class
time lost » time cost, time loss, time list
dan yang » daun yang, tan yang, wang yang
yang yi » yang di, yang xi, yang jui

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: dan yang yi ((time last) OR (time lost)) teaching chinese roberto bin ;~.
• Adding a wildcard symbol may retrieve word variants: dan yang yi ((time last) or (time lost)) teaching chinese roberto bin ;*.