Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, nhieu tang
nhung cong » dung cong, thong cong, hang cong
hieu lang » hieu quang, nhieu tang, hieu van
trung cua » truong cua, trung tuan, trung cap
tran tuan » tran xuan, tran quang, tran thanh
tung cua » tuong cua, dung cua, tang cua
cong tan » cong tac, cong san, cong thanh

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

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