Perhaps you should try some spelling variations:
di terrence » di erence, deal terrence
zhang yan » zhang fan, zhang jian, wang yan
yan yuan » yan guan, fang yuan, nan yan
dr rene » der rent
li rong » yi rong, li cong, shi rong
li song » li cong, kim song, jie song
tang » tan, lang, wang

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

• If you are trying to use Boolean operators, they must be ALL CAPS: zhang yan yuan ((dr rene) OR (di terrence)) tang ((li rong) OR (li song)) yu ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "zhang yan yuan ((dr rene) or (di terrence)) tang ((li rong) OR (li song)) yu ;~".
• Adding a wildcard symbol may retrieve word variants: zhang yan yuan ((dr rene) or (di terrence)) tang ((li rong) OR (li song)) yu ;*.