Perhaps you should try some spelling variations:
heat gain » health gain, health gains, wheat grains
dang hadi » dang hai
yan guan » gan guan, yan yuan, yang guang
yang jin » yang jie, yang jun, ying jin
yang jui » yang judy, yang di, yang xi
wan yan » wang yan, nan yan, wai yan
yang li » yang lin, yang di, yang xi

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

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