Perhaps you should try some spelling variations:
heat gain » health gain, health gains, wheat grains
ryang lin » yang lin, huang lin, wang lin
ryang jie » yang jie, yang jin, ryan die
dang hadi » dang hai
ryang xi » yang xi, yang di, yang li
wang » wing, wan, lang
yan » yang, ryan
ryang » ryangg, rryang

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 tube heat gain ((ryang lin) or (((ryang jie) or (ryang xi)))) dang hadi ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang yan tube heat gain ((ryang lin) OR (((ryang jie) OR (ryang xi)))) dang hadi ;.
• Adding a wildcard symbol may retrieve word variants: wang yan tube heat gain ((ryang lin) or (((ryang jie) or (ryang xi)))) dang hadi ;*.