Perhaps you should try some spelling variations:
thanh trung » thanh tung
hien hanh » dieu hanh
va truong » van truong, xa truong, va thuong
va trong » va thong, va tuong, va trung
cong tan » cong tac, cong thanh, cong ty
cong san » cong tac
phan cau » phan dau, phan cac, phan tu

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 - thanh trung ((va trong) OR (va truong)) ((cong tan) or (cong san)) phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien hanh - thanh trung ((va trong) OR (va truong)) ((cong tan) OR (cong san)) phan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien hanh - thanh trung ((va trong) OR (va truong)) ((cong tan) or (cong san)) phan cau".
• Adding a wildcard symbol may retrieve word variants: hoc hien hanh - thanh trung ((va trong) OR (va truong)) ((cong tan) or (cong san)) phan cau*.