Perhaps you should try some spelling variations:
thanh trung » thanh tung
hanh trang » canh tranh, hanh trinh, minh trang
hien hanh » dieu hanh
dung cong » dung trong
cong tan » cong tac, cong san, cong thanh
than cau » toan cau, than cap, thanh chau
phan cau » phan dau, phan cac, phan tu

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 hanh - ((hanh trang) OR (thanh trung)) tin dung cong tan ((than cau) OR (phan cau))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien hanh - ((hanh trang) OR (thanh trung)) tin dung cong tan ((than cau) or (phan cau))~".
• Adding a wildcard symbol may retrieve word variants: hoc hien hanh - ((hanh trang) OR (thanh trung)) tin dung cong tan ((than cau) or (phan cau))*.