Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hieu lang » chieu sang, hieu quang, nhieu tang
dung cong » dung trong
trung va » truong va, trang va, trung tam
trung ha » trung hoc, trung tam, trung cap
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 ((hieu lang) or (chieu xanh)) - thanh ((trung va) OR (trung ha)) dung cong ban than cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu lang) OR (chieu xanh)) - thanh ((trung va) OR (trung ha)) dung cong ban than cap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu lang) or (chieu xanh)) - thanh ((trung va) OR (trung ha)) dung cong ban than cap".
• Adding a wildcard symbol may retrieve word variants: ho ((hieu lang) or (chieu xanh)) - thanh ((trung va) OR (trung ha)) dung cong ban than cap*.