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 tac » cong ty
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((chieu sach) or (chieu sang)) - hanh trinh luat dong cong tac ((toan cau) or (van ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu sach) OR (chieu sang)) - hanh trinh luat dong cong tac ((toan cau) OR (van ban)).
• Adding a wildcard symbol may retrieve word variants: doi ((chieu sach) or (chieu sang)) - hanh trinh luat dong cong tac ((toan cau) or (van ban))*.