Perhaps you should try some spelling variations:
thanh trung » thanh tung
khong cong » thong cong, khong cang, chong cong
hien hanh » dieu hanh
hua khong » hoa khong, cua khong, hoac khong
hien anh » thien anh, dien anh, tien anh
cong dan » cong san, cong tan, huong dan
dan phan » doan phan, dan chan, van phan

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) or (thanh cong)) hua khong cong dan phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien anh) OR (hien hanh)) - ((thanh trung) OR (thanh cong)) hua khong cong dan phan tu.
• Adding a wildcard symbol may retrieve word variants: hoc ((hien anh) or (hien hanh)) - ((thanh trung) or (thanh cong)) hua khong cong dan phan tu*.