Perhaps you should try some spelling variations:
heat gain » health gain, health gains, wheat grains
run gain » run pain
yan tan » tan tan, yan clan, yan guan
yang xi » yang di, yang yi, yang jui
song g » song _, song c
hong g » hong ng, hong w, hong a
hong 7 » hong w, hong a
wang » wing, wan, lang

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: wang yan tan ((heat gain) OR (run gain)) yang xi ((song g) OR (((hong g) OR (hong 7)))) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yan tan ((heat gain) or (run gain)) yang xi ((song g) or (((hong g) OR (hong 7)))) ;~".
• Adding a wildcard symbol may retrieve word variants: wang yan tan ((heat gain) or (run gain)) yang xi ((song g) or (((hong g) OR (hong 7)))) ;*.