Perhaps you should try some spelling variations:
yan yuan » yan guan, fang yuan, nan yan
yan yan » nan yan, yang yang, wang yan
di rene » di rete, dr rene, i rene
li hong » le hong, li cong, li rong
hong yu » wong yue
tan li » tang li, tian li, gan li
wang » wing, wan, lang
erence » terence, terrence

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 yan) OR (yan yuan)) ((di rene) or (di erence)) tan li hong yu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang ((yan yan) OR (yan yuan)) ((di rene) OR (di erence)) tan li hong yu ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang ((yan yan) OR (yan yuan)) ((di rene) or (di erence)) tan li hong yu ;*".