Perhaps you should try some spelling variations:
teaching chinese » teaching china, teaching case, teaching cases
chinese robert » chase robert
time past » time part, time pad, some past
time last » time list, time lost, time class
ying jin » jing ji, yang jie
yang jin » yang jie, yang jun, shang jin
robert n » robert _, robert e, robert j

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 jin) OR (yang jin)) ((time last) OR (time past)) teaching chinese robert n ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tan ((ying jin) or (yang jin)) ((time last) OR (time past)) teaching chinese robert n ;~".
• Adding a wildcard symbol may retrieve word variants: tan ((ying jin) or (yang jin)) ((time last) OR (time past)) teaching chinese robert n ;*.