Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, nhieu tang
hieu lang » hieu quang, nhieu tang, hieu van
dung long » dung luong, dung cong, dung dong
long tinh » cong tinh, trong tinh, luong tin
trang va » tran van, hang va
trung ha » trung hoc, trung tam, trung cap
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((chieu sang) OR (hieu lang)) - thanh ((trang va) or (trung ha)) dung long tinh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu sang) OR (hieu lang)) - thanh ((trang va) OR (trung ha)) dung long tinh toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu sang) OR (hieu lang)) - thanh ((trang va) or (trung ha)) dung long tinh toan ban".
• Adding a wildcard symbol may retrieve word variants: doi ((chieu sang) OR (hieu lang)) - thanh ((trang va) or (trung ha)) dung long tinh toan ban*.