Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hanh trang » thanh trung, canh tranh, hanh trinh
hoc chieu » hoc thieu, ho chieu, hoc hien
trang va » tran van, hang va
cong tac » cong ty
toan cau » toan cao, toan tap, toan tai
toan ban » van ban
doi chi » doi khi

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: ((hoc chieu) OR (doi chi)) xanh - hanh trang va nhung cong tac ((toan cau) OR (toan ban))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc chieu) or (doi chi)) xanh - hanh trang va nhung cong tac ((toan cau) OR (toan ban))~".
• Adding a wildcard symbol may retrieve word variants: ((hoc chieu) or (doi chi)) xanh - hanh trang va nhung cong tac ((toan cau) OR (toan ban))*.