Perhaps you should try some spelling variations:
yang fan » zhang fan, yang dean, yang yang
hua rene » hua ren, juan rene
yuan thi » yuan fei, nhan thi, phan thi
tran thi » trang thu
yan fan » yan clan, yan guan, yan wang
hong ng » hong kong, hong jong, hong hong
hong 7 » hong w, hong a, hong g
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 ((yan fan) OR (yang fan)) hua rene ((yuan thi) or (tran thi)) ((hong 7) or (hong ng)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang ((yan fan) OR (yang fan)) hua rene ((yuan thi) OR (tran thi)) ((hong 7) OR (hong ng)) ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang ((yan fan) OR (yang fan)) hua rene ((yuan thi) or (tran thi)) ((hong 7) or (hong ng)) ;*".