Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hanh tranh » canh tranh, hanh trinh, hanh trang
hieu manh » chieu xanh, hieu nganh, dieu hanh
tranh cua » doanh cua, manh cua
cua nhung » va nhung
tac vang » cac van, tac dung, tac dong
tac van » cac van, tac va, tac can

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((hieu manh) or (trieu tinh)) - hanh tranh cua nhung cong ((tac van) OR (tac vang)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((hieu manh) OR (trieu tinh)) - hanh tranh cua nhung cong ((tac van) OR (tac vang)) ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((hieu manh) or (trieu tinh)) - hanh tranh cua nhung cong ((tac van) OR (tac vang)) ban".
• Adding a wildcard symbol may retrieve word variants: doi ((hieu manh) or (trieu tinh)) - hanh tranh cua nhung cong ((tac van) OR (tac vang)) ban*.