Perhaps you should try some spelling variations:
doanh doanh » toan doanh, doanh hoan, doanh thanh
cong thanh » dong thanh, cong trinh, cong tan
nhan dong » nhanh dong, nhan dang, phan dong
dong cong » duong cong, dung cong, dang cong
doc hieu » hoc thieu, hoc hien
sang ban » nang ban, sang bae, lang ban
hang ban » hang luan, hang va, hang tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doc hieu) or (toc thieu)) xanh - doanh doanh nhan dong cong thanh ((sang ban) OR (hang ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (toc thieu)) xanh - doanh doanh nhan dong cong thanh ((sang ban) OR (hang ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doc hieu) or (toc thieu)) xanh - doanh doanh nhan dong cong thanh ((sang ban) OR (hang ban))".
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (toc thieu)) xanh - doanh doanh nhan dong cong thanh ((sang ban) OR (hang ban))*.