Perhaps you should try some spelling variations:
wang yuan » wang yuhan, wang yan, fang yuan
yuan kang » yuan wang, yuan chang, chan kang
dai phong » hai phong, kai hong
bai chong » lai chung, wai chung, hai phong
ii china » 3 china, 1 china
ri chin » chi chin
2 china » 4 china

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang yuan kang ((ri chin) or (((ii china) OR (2 china)))) chang ((dai phong) or (bai chong)) shu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang yuan kang ((ri chin) OR (((ii china) OR (2 china)))) chang ((dai phong) OR (bai chong)) shu ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yuan kang ((ri chin) or (((ii china) OR (2 china)))) chang ((dai phong) or (bai chong)) shu ;*".