Perhaps you should try some spelling variations:
chau tinh » ha tinh, cua tinh, cac tinh
hanh tang » hanh trang, anh tang, hanh mang
cua dung » cua dang, qua dung, cua rung
cua dong » chua dong, cua cong, cua dang
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cau » toan cao, toan ban, toan tap

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: a ((chau tinh) OR (cuu tinh)) - hanh tang ((cua dung) OR (cua dong)) cong tac toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "a ((chau tinh) OR (cuu tinh)) - hanh tang ((cua dung) or (cua dong)) cong tac toan cau~".
• Adding a wildcard symbol may retrieve word variants: a ((chau tinh) OR (cuu tinh)) - hanh tang ((cua dung) or (cua dong)) cong tac toan cau*.