Perhaps you should try some spelling variations:
thuong cong » thong cong, thuong con, thuong dong
doanh cua » doanh luan
toc hieu » doc hieu, hoc thieu, thuc hieu
manh cua » ban cua
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan ban » van ban

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: ((toc hieu) OR (toc thieu)) manh - lanh ((manh cua) OR (doanh cua)) thuong cong tan toan ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc hieu) OR (toc thieu)) manh - lanh ((manh cua) or (doanh cua)) thuong cong tan toan ban~".
• Adding a wildcard symbol may retrieve word variants: ((toc hieu) OR (toc thieu)) manh - lanh ((manh cua) or (doanh cua)) thuong cong tan toan ban*.