Perhaps you should try some spelling variations:
heat gain » health gain, health gains, wheat grains
dang hadi » dang hai
yan tuan » yan guan, anh tuan, can turn
yan yuan » yan guan, fang yuan, nan yan
yang lin » wang lin, yang li, yang liang
yang jin » yang jie, yang jun, ying jin
yang yi » yang di, yang xi, yang jui
wang » wing, wan, lang

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

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