Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, nhieu tang
trung tuan » trung thanh, tran tuan, truong thanh
nhung cong » dung cong, thong cong, hang cong
hieu lang » hieu quang, nhieu tang, hieu van
cong tan » cong tac, cong san, cong thanh
tran cau » tran chau, toan cau, ran cau

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