Perhaps you should try some spelling variations:
wang yuhan » wang luhang, wang yan, wang yidan
yuhan tin » yuan ting
hoang ya » hoang vu, hoang _, hoang h
hoang sy » hoang vu
hua wang » hwa wang, hua jiang, yuan wang
hong yu » wong yue
hong g » hong ng, hong w, hong 7
hai » hadi, haji, hari

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

• Performing a fuzzy search may retrieve terms with similar spellings: dong ((((hoang ya) OR (hong yu))) or (hoang sy)) hua wang yuhan tin ((hong g) or (dang hai)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: dong ((((hoang ya) OR (hong yu))) OR (hoang sy)) hua wang yuhan tin ((hong g) OR (dang hai)) ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "dong ((((hoang ya) OR (hong yu))) or (hoang sy)) hua wang yuhan tin ((hong g) or (dang hai)) ;*".