Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu xanh
chieu sang » chieu xanh, hieu lang, nhieu tang
hanh trinh » canh tranh, hanh chinh
luat dong » luat cong, luat bong, luan dong
dong cong » duong cong, dung cong, dang cong
cong tan » cong tac, cong san, cong thanh
tan than » tan thanh, tan tran, ban than
than cau » toan cau, phan cau, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu sach) OR (chieu sang)) - hanh trinh luat dong cong tan than cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sach) OR (chieu sang)) - hanh trinh luat dong cong tan than cau".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) OR (chieu sang)) - hanh trinh luat dong cong tan than cau*.