Perhaps you should try some spelling variations:
vien nganh » vien thanh
thong cong » trong cong, tong cong, thong thong
hieu manh » chieu xanh, hieu nganh, dieu hanh
hiem ngan » kim ngan, viem gan
tranh cua » doanh cua, manh cua
cua thong » cua thuong, cua khong, cua tong
cong tap » cuong tap, cong tac, cong tan
tap quan » tac quan, hai quan
quan ban » quang ban, qua ban, quan van

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