Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu xanh, nhieu tang
chieu sach » chinh sach, chiet tach, chieu xanh
nhung cong » dung cong, thong cong, hang cong
hieu lang » hieu quang, nhieu tang, hieu van
trung cua » truong cua, trung tuan, trung cap
cua nhung » va nhung
cong ban » cong bang, cong san, cong tan
ban than » ban thanh, van thanh, ban hang
than cap » khan cap, thanh lap, thanh cac

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