Perhaps you should try some spelling variations:
luong thanh » long thanh, truong thanh
yang liang » wang liang, yan liang, yang yang
lang anh » dang anh, lang lang, lang und
anh tuan » anh tran, dinh tuan, oanh tran
yang jie » yang jin, yang di, yang jui
tuan vu » thanh vu, tuan hua
vu gain » you gain, run gain, via gain

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: lang anh tuan vu gain ((yang liang) or (yang jie)) ((long haul) or (luong thanh)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: lang anh tuan vu gain ((yang liang) OR (yang jie)) ((long haul) OR (luong thanh)) ;.
• Adding a wildcard symbol may retrieve word variants: lang anh tuan vu gain ((yang liang) or (yang jie)) ((long haul) or (luong thanh)) ;*.