Perhaps you should try some spelling variations:
cong thanh » dong thanh, cong trinh, cong tan
hieu lang » chieu sang, hieu quang, nhieu tang
trung cua » truong cua, trung tuan, dung cua
trung cap » truong cao, trung tam
dung cong » dung trong
ho hieu » ho chieu, hoi hieu, nho hieu
san cau » van cau, ban cau, can cau

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 cua) OR (trung cap)) dung cong thanh san cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho hieu lang - thanh ((trung cua) OR (trung cap)) dung cong thanh san cau".
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - thanh ((trung cua) OR (trung cap)) dung cong thanh san cau*.