Perhaps you should try some spelling variations:
thanh trung » thanh tung
hien hanh » dieu hanh
cua thong » cua thuong, cua khong, suat thong
hien anh » thien anh, dien anh, tien anh
cua tong » cua cong, cua dong, cua nong
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cau » toan cau, phan cau, than 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 anh) OR (hien hanh)) - thanh trung ((cua thong) or (cua tong)) cong dan than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien anh) OR (hien hanh)) - thanh trung ((cua thong) OR (cua tong)) cong dan than cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien anh) OR (hien hanh)) - thanh trung ((cua thong) or (cua tong)) cong dan than cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien anh) OR (hien hanh)) - thanh trung ((cua thong) or (cua tong)) cong dan than cau*.