Perhaps you should try some spelling variations:
hieu manh » chieu xanh, hieu nganh, dieu hanh
tong cong » trong cong, cong cong, dung cong
hoc hieu » hoc thieu, hoc hien, doc hieu
cua tong » cua cong, cua dong, cua nong
cong tap » cuong tap, cong tac, cong tan
quan van » luan van, quan va, quan luan
qua ban » cua ban, qua quan

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 chinh) or (canh tranh)) cua tong cong tap ((quan van) or (qua ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - ((hanh chinh) OR (canh tranh)) cua tong cong tap ((quan van) OR (qua ban)).
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - ((hanh chinh) or (canh tranh)) cua tong cong tap ((quan van) or (qua ban))*.