Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh
nhieu tang » nhiet nang
nhung cong » dung cong, thong cong, hang cong
hieu lang » hieu quang, hieu van, biet lang
tranh cua » doanh cua, manh cua
cua nhung » va nhung
cong tan » cong tac, cong san, cong thanh
tan phan » toan phan, than phan, van phan
phan cac » nhan cach, phan dau, phan lap

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

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