Perhaps you should try some spelling variations:
yang liang » wang liang, yan liang, yang yang
yang tuan » yang guang, yang dean, yang fan
tuan heat » tuan hua, tube heat
heat gain » health gain, health gains, wheat grains
dang hari » dang hai
wei yang » pei yang, wei wang, wei yang's
yang jin » yang jie, yang jun, ying jin

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

• Performing a fuzzy search may retrieve terms with similar spellings: wei yang tuan heat gain ((((wang yan) or (yang liang))) or (yang jin)) dang hari ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wei yang tuan heat gain ((((wang yan) OR (yang liang))) OR (yang jin)) dang hari ;.
• Adding a wildcard symbol may retrieve word variants: wei yang tuan heat gain ((((wang yan) or (yang liang))) or (yang jin)) dang hari ;*.