Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, hieu manh
hanh trinh » canh tranh, hanh chinh
trinh cua » tinh cua, trinh luat, trinh quan
cua nhung » va nhung
cuong tap » luong tap, cong tac, cong tan
luong tai » dung tai
hoc hieu » hoc thieu, hoc hien, doc hieu
luong va » dung va
quan cap » quan cau, quan lap, quang cao

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu nganh - hanh trinh cua nhung ((cuong tap) OR (((luong tai) OR (luong va)))) quan cap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hieu nganh - hanh trinh cua nhung ((cuong tap) or (((luong tai) OR (luong va)))) quan cap~".
• Adding a wildcard symbol may retrieve word variants: hoc hieu nganh - hanh trinh cua nhung ((cuong tap) or (((luong tai) OR (luong va)))) quan cap*.