Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
chieu sang » chieu sach, chieu xanh, nhieu tang
nhung cong » dung cong, thong cong, hang cong
hieu lang » hieu quang, nhieu tang, hieu van
cua nhung » va nhung
dong cua » dung cua, cong cua, huong cua
cong tac » cong ty
tac than » tac thanh, tam than, tac nhan
than cau » toan cau, phan cau, than cap
ha dong » hoat dong, van dong

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 tinh) or (((chieu sang) OR (hieu lang)))) - ha dong cua nhung cong tac than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu tinh) OR (((chieu sang) OR (hieu lang)))) - ha dong cua nhung cong tac than cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu tinh) or (((chieu sang) OR (hieu lang)))) - ha dong cua nhung cong tac than cau*".