Perhaps you should try some spelling variations:
thien hoat » trien hoat, thien thuat, tien hoa
trinh hang » trinh han, tranh hang, trinh hanh
hang hang » nang hang, cang thang, hung thang
kiem soat » kiem toan
dung nang » dun nang, dung dang, dung quang
bien soan » bien so
nang van » dang van, tang van, lang van
van bien » van tien, van hien, vat bien

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( trinh hang hang va ((kiem soat) or (thien hoat)) ) or ( tin dung nang van bien soan ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( trinh hang hang va ((kiem soat) OR (thien hoat)) ) OR ( tin dung nang van bien soan )).
• Adding a wildcard symbol may retrieve word variants: (( trinh hang hang va ((kiem soat) or (thien hoat)) ) or ( tin dung nang van bien soan ))*.