Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
hanh trinh » canh tranh, hanh chinh
trinh cua » tinh cua, trinh luat, trinh quan
dang cong » dung cong
cua dang » cua cong, cua ban
cong tan » cong tac, cong san, cong thanh
toan cao » toan ban
toan tap » toan ban
tinh » dinh, minh, kinh

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: ho ((trieu tinh) OR (chieu sang)) - hanh trinh cua dang cong tan ((toan cao) OR (toan tap))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((trieu tinh) or (chieu sang)) - hanh trinh cua dang cong tan ((toan cao) OR (toan tap))~".
• Adding a wildcard symbol may retrieve word variants: ho ((trieu tinh) or (chieu sang)) - hanh trinh cua dang cong tan ((toan cao) OR (toan tap))*.