Perhaps you should try some spelling variations:
wang yang » wang yan, wang liang, wang yanling
yang yan » yang yang, wang yan, yang fan
di rene » di rete, dr rene, i rene
li hong » le hong, li cong, li song
li rong » yi rong, li cong, li song
erence » terence, terrence
tang » tan, lang, gang

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang yang yan ((di rene) or (di erence)) tang ((li hong) or (li rong)) yu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang yang yan ((di rene) OR (di erence)) tang ((li hong) OR (li rong)) yu ;.
• Adding a wildcard symbol may retrieve word variants: wang yang yan ((di rene) or (di erence)) tang ((li hong) or (li rong)) yu ;*.