Perhaps you should try some spelling variations:
thanh trung » thanh tung
hien hanh » dieu hanh
cong bang » cuong bang, dong bang, hong bang
tien anh » tieng anh, tien manh, dien anh
tam tong » tai tong, tam nong, tam song
cong ban » cong san, cong tan, cong dan
chan cap » khan cap, than cap, cao cap

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 hanh) or (tien anh)) - thanh trung tam tong ((cong ban) OR (cong bang)) chan cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien hanh) OR (tien anh)) - thanh trung tam tong ((cong ban) OR (cong bang)) chan cap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien hanh) or (tien anh)) - thanh trung tam tong ((cong ban) OR (cong bang)) chan cap".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien hanh) or (tien anh)) - thanh trung tam tong ((cong ban) OR (cong bang)) chan cap*.