Perhaps you should try some spelling variations:
chieu sang » chieu xanh, hieu lang, nhieu tang
chieu sach » chinh sach, chiet tach, chieu xanh
thong cong » trong cong, tong cong, thong thong
cong thanh » dong thanh, cong trinh, cong tan
tranh va » tranh van, trang va, trinh va
va thong » va thuong, va phuong, he thong
toan cau » toan cao, toan ban, toan tap
ban cau » bang cau, ban can, van cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chieu sang) or (chieu sach)) - canh tranh va thong cong thanh ((ban cau) or (toan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sang) OR (chieu sach)) - canh tranh va thong cong thanh ((ban cau) OR (toan cau)).
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sang) or (chieu sach)) - canh tranh va thong cong thanh ((ban cau) or (toan cau))*.