Perhaps you should try some spelling variations:
di terence » di erence, liu terence, _ terence
yang guang » yang yang, yang liang
yan guan » gan guan, yan yuan, yihan guan
wong yue » wang yue, hong yu
dr rene » der rent
tian li » tan li, kian lia
rong yu » hong yu, rong su, song yun

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: lang ((yan guan) OR (yang guang)) ((dr rene) OR (di terence)) tian li ((rong yu) OR (wong yue)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "lang ((yan guan) OR (yang guang)) ((dr rene) or (di terence)) tian li ((rong yu) or (wong yue)) ;~".
• Adding a wildcard symbol may retrieve word variants: lang ((yan guan) OR (yang guang)) ((dr rene) or (di terence)) tian li ((rong yu) or (wong yue)) ;*.