Perhaps you should try some spelling variations:
hanh trung » thanh trung, hanh trang, manh trung
trung cua » truong cua, trung tuan, trung cap
dung cong » dung trong
doc hieu » hoc thieu, hoc hien
cua dung » cua dang, cua dong, qua dung
cong tac » cong ty
toan cau » toan cao, toan ban, toan tai
toan tap » toan 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: ((doc hieu) OR (toc thieu)) xanh - hanh trung cua dung cong tac ((toan cau) OR (toan tap))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doc hieu) OR (toc thieu)) xanh - hanh trung cua dung cong tac ((toan cau) or (toan tap))~".
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) OR (toc thieu)) xanh - hanh trung cua dung cong tac ((toan cau) or (toan tap))*.