Perhaps you should try some spelling variations:
cong thanh » dong thanh, cong trinh, truong thanh
mot trieu » mot chieu, mot tri, mon triet
cach manh » cach mang, cach nhanh, sach danh
manh cua » doanh cua, ban cua
cua dong » chua dong, cua cong, cua dang
cong tan » cong tac, cong san, cong ty
phan dau » phan tu, hang dau
nhan dan » gian dan, nhan tai
tinh » trinh, dinh, minh

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

• Performing a fuzzy search may retrieve terms with similar spellings: mot trieu tinh - cach manh cua dong ((cong tan) OR (cong thanh)) ((phan dau) or (nhan dan))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: mot trieu tinh - cach manh cua dong ((cong tan) OR (cong thanh)) ((phan dau) OR (nhan dan)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "mot trieu tinh - cach manh cua dong ((cong tan) OR (cong thanh)) ((phan dau) or (nhan dan))".
• Adding a wildcard symbol may retrieve word variants: mot trieu tinh - cach manh cua dong ((cong tan) OR (cong thanh)) ((phan dau) or (nhan dan))*.