Perhaps you should try some spelling variations:
trinh han » trinh quan
hieu soat » hieu suat, hieu hoat, hieu luat
dung lang » dung dang, dung nang, dung land
kien soat » bien soan, kien hoa, dien hoat
kiem soat » kiem toan
han hang » hang hang, han chang, ban hang
lang van » dang van, tang van, hoang van
va hieu » van hieu, va dieu, va hien

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( trinh han hang va hieu soat ) or ( tin dung lang van ((kien soat) OR (kiem soat)) ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( trinh han hang va hieu soat ) OR ( tin dung lang van ((kien soat) OR (kiem soat)) )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( trinh han hang va hieu soat ) or ( tin dung lang van ((kien soat) OR (kiem soat)) ))".
• Adding a wildcard symbol may retrieve word variants: (( trinh han hang va hieu soat ) or ( tin dung lang van ((kien soat) OR (kiem soat)) ))*.