Perhaps you should try some spelling variations:
yang liang » wang liang, yan liang, yang yang
long thanh » luong thanh, long trinh, truong thanh
lang yan » wang yan, wang yang, zhang yan
yan tuan » yan guan, yan yuan, anh tuan
tuan hua » tan hua, tuan vu, yuan hui
hua gain » heat gain, run gain, hua ban
yang jin » yang jie, yang jun, ying jin
long han » long chain, long haul, jeong han

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

• Performing a fuzzy search may retrieve terms with similar spellings: lang yan tuan hua gain ((yang liang) or (yang jin)) ((long han) OR (long thanh)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: lang yan tuan hua gain ((yang liang) OR (yang jin)) ((long han) OR (long thanh)) ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "lang yan tuan hua gain ((yang liang) or (yang jin)) ((long han) OR (long thanh)) ;".
• Adding a wildcard symbol may retrieve word variants: lang yan tuan hua gain ((yang liang) or (yang jin)) ((long han) OR (long thanh)) ;*.