Perhaps you should try some spelling variations:
thanh trung » thanh tung
hien hanh » dieu hanh
trung cua » truong cua, trung tuan, trung cap
cua trong » cua truong, cua trung, qua trong
cong ban » cong bang, cong san, cong dan
cong tan » cong tac, cong san, cong thanh
than cau » toan cau, phan cau, than cap
toan tap » toan ban

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