Perhaps you should try some spelling variations:
dinh quan » dinh quang, dinh xuan, dinh duan
hieu luat » hieu qua
tinh nang » trinh nang, tin nang, tich nang
nang luan » tang luan, hang luan, nang quan
kien soat » kiem soat, bien soan, kien hoa
van hieu » cao hieu
van kien » van tien, van hien, van chien
tri van » thi van, tri va, trinh van

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: (( dinh quan tri van hieu luat ) OR ( tinh nang luan van kien soat ))~.
• Adding a wildcard symbol may retrieve word variants: (( dinh quan tri van hieu luat ) or ( tinh nang luan van kien soat ))*.