Perhaps you should try some spelling variations:
lang yan » wang yan, wang yang, zhang yan
hua gain » heat gain, run gain, hua ban
yang lin » yang jin, wang lin, yang li
ying jin » yang jin, jing ji, yang jie
long han » long chain, long thanh, long haul
yan tan » tan tan, yan clan, yan guan
tan hua » tuan hua, wang hua, tan chia

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 tan hua gain ((yang lin) or (ying jin)) long han ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: lang yan tan hua gain ((yang lin) OR (ying jin)) long han ;.
• Adding a wildcard symbol may retrieve word variants: lang yan tan hua gain ((yang lin) or (ying jin)) long han ;*.