Perhaps you should try some spelling variations:
yiqian wang » yijiang wang, liqin wang
truong tran » truong thanh, truong xuan, tung tran
longer trip » longer trips, long trip
qian wang » qian rong, qian yan, yan wang
hong paul » ron paul
zhi qing » he qing, shi ding, shi ling
yan zhi » yan zi, wang zhi

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: ((qian wang) OR (yiqian wang)) yan zhi qing ((truong tran) OR (longer trip)) hong paul ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((qian wang) OR (yiqian wang)) yan zhi qing ((truong tran) or (longer trip)) hong paul ;~".
• Adding a wildcard symbol may retrieve word variants: ((qian wang) OR (yiqian wang)) yan zhi qing ((truong tran) or (longer trip)) hong paul ;*.