Perhaps you should try some spelling variations:
congo can » congo call, cong van, congo a
than our » than your, than one
than you » can you
hang yan » zhang yan, wang yan, huang yang
cong sun » cong shu, cong van, wing sun
yan jiu » yang jie, yang jin, pang jiu
wang » wing, wan, lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang yanling ((than our) OR (than you)) hang yan jiu ((cong sun) or (congo can)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang yanling ((than our) OR (than you)) hang yan jiu ((cong sun) OR (congo can)) ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yanling ((than our) OR (than you)) hang yan jiu ((cong sun) or (congo can)) ;*".