Perhaps you should try some spelling variations:
hieu manh » chieu xanh, hieu nganh, dieu hanh
hanh tinh » hanh trinh, nhanh tinh, thanh tinh
cua thong » cua thuong, cua khong, cua tong
than phan » thanh phan, toan phan, thanh pham
hoc hieu » hoc thieu, hoc hien, doc hieu
tinh cua » trinh cua, sinh cua, tinh chat
cong san » cong tac

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hieu manh - hanh tinh cua thong ((cong san) or (huong dan)) ((than phan) or (thanh san))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - hanh tinh cua thong ((cong san) OR (huong dan)) ((than phan) OR (thanh san)).
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - hanh tinh cua thong ((cong san) or (huong dan)) ((than phan) or (thanh san))*.