Perhaps you should try some spelling variations:
hien nhanh » hien hanh, thien thanh, tien thanh
hanh trong » hanh trang, anh trong, hinh trong
hien xanh » hien hanh, chieu xanh, hien khanh
cao dong » cao dang, lao dong, cao cong
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hien xanh) or (hien nhanh)) - hanh trong ((xay dung) or (cao dong)) cong tac toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien xanh) OR (hien nhanh)) - hanh trong ((xay dung) OR (cao dong)) cong tac toan cao.
• Adding a wildcard symbol may retrieve word variants: hoc ((hien xanh) or (hien nhanh)) - hanh trong ((xay dung) or (cao dong)) cong tac toan cao*.