Perhaps you should try some spelling variations:
yuhan wang » yan wang, yuhuan huang
have zhang » have change, have changed
yuan wang » yan wang, yuan chang, qian wang
yuan kang » yuan chang, chan kang, yuan kai
can have » may have
fan cong » yan cong, fan cone, fan along
cong van » congo can, duong van, cong sun

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 (yuan wang))) or (yuan kang)) can have zhang fan cong van ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang ((((yuhan wang) OR (yuan wang))) OR (yuan kang)) can have zhang fan cong van ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang ((((yuhan wang) OR (yuan wang))) or (yuan kang)) can have zhang fan cong van ;*".