Perhaps you should try some spelling variations:
tinh dung » trinh dung, tin dung, tinh quang
dung lang » dung dang, dung nang, dung land
hieu luat » hieu qua
kien soat » bien soan, kien hoa, dien hoat
kiem soat » kiem toan
lang van » dang van, tang van, hoang van
van hieu » cao hieu
doanh va » doan va, doanh tai, doanh cua

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (( tinh dung lang van hieu luat ) OR ( trinh luat doanh va ((kien soat) OR (kiem soat)) ))~.
• Adding a wildcard symbol may retrieve word variants: (( tinh dung lang van hieu luat ) or ( trinh luat doanh va ((kien soat) or (kiem soat)) ))*.