Perhaps you should try some spelling variations:
hieu lang » chieu sang, hieu quang, nhieu tang
trung qua » trung quan, trung cua, truong quan
trong qua » trong quan, thong qua, trong nha
dung cong » dung trong
thanh cau » thanh chau, thanh mau, thanh ca
nhanh cau » nhanh cay, thanh chau, nhanh ha
cong san » cong tac
ho hieu » ho chieu, hoi hieu, nho hieu

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 - thanh ((trung qua) OR (trong qua)) dung cong san ((thanh cau) or (nhanh cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - thanh ((trung qua) OR (trong qua)) dung cong san ((thanh cau) OR (nhanh cau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho hieu lang - thanh ((trung qua) OR (trong qua)) dung cong san ((thanh cau) or (nhanh cau))".
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - thanh ((trung qua) OR (trong qua)) dung cong san ((thanh cau) or (nhanh cau))*.