Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hien hach » thien hach, hien hanh, hien nhanh
trinh cua » tinh cua, trinh quan, trinh luan
tranh cua » doanh cua, manh cua
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan cao » toan ban, toan tap
luat » luan, xuat

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: hoc hien hach - hanh ((((trinh cua) OR (trinh luat))) OR (tranh cua)) nhung cong tan toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien hach - hanh ((((trinh cua) OR (trinh luat))) or (tranh cua)) nhung cong tan toan cao~".
• Adding a wildcard symbol may retrieve word variants: hoc hien hach - hanh ((((trinh cua) OR (trinh luat))) or (tranh cua)) nhung cong tan toan cao*.