Perhaps you should try some spelling variations:
last teaching » class teaching, breast teaching, based teaching
change robert » change roberto, chase robert, zhang robert
chang roberto » chase robert
time last » time list, time past, time lost
tan yang » dan yang, tan ying, tan yong
ran ying » fan ying, tan ying, jin 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 yang) OR (ran ying)) di time last teaching ((change robert) OR (chang roberto)) e ;~.
• Adding a wildcard symbol may retrieve word variants: ((tan yang) or (ran ying)) di time last teaching ((change robert) or (chang roberto)) e ;*.