Perhaps you should try some spelling variations:
yuhan wang » yuan wang, yuhuan huang
heat gain » health gain, health gains, wheat grains
shang hai » shang kai, dang hai, chang ha
yan wang » yuan wang, yang yang, qian wang
hua gain » run gain, hua ban, via gain
yang xi » yang di, yang jui
yang yi » yang di, yang jui

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

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