Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, nhieu tang
hanh tranh » canh tranh, hanh trinh, hanh trang
cong thanh » dong thanh, cong trinh, truong thanh
hieu lang » hieu quang, nhieu tang, hieu van
tranh cua » doanh cua, manh cua
cua dung » cua dang, cua dong, qua dung
cong tan » cong tac, cong san, cong ty
phan cau » phan dau, phan cac, phan tu

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 sang) or (hieu lang)) - hanh tranh cua dung ((cong tan) OR (cong thanh)) phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sang) OR (hieu lang)) - hanh tranh cua dung ((cong tan) OR (cong thanh)) phan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sang) or (hieu lang)) - hanh tranh cua dung ((cong tan) OR (cong thanh)) phan cau".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sang) or (hieu lang)) - hanh tranh cua dung ((cong tan) OR (cong thanh)) phan cau*.