Perhaps you should try some spelling variations:
yang liang » wang liang, yang yang, peng liang
yan liang » wang liang, you liang, yan wang
wenn das » wenn die
hua gain » heat gain, run gain, hua ban
yang jie » yang jin, yang jui, yang xi
chang ha » chang mae
das tan » das tag, das ton, tas tan
tan hua » tuan hua, wang hua, tan chia

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: wenn das tan hua gain ((((yang liang) OR (yan liang))) OR (((yang jie) OR (yang di)))) chang ha ;~.
• Adding a wildcard symbol may retrieve word variants: wenn das tan hua gain ((((yang liang) or (yan liang))) or (((yang jie) or (yang di)))) chang ha ;*.