Perhaps you should try some spelling variations:
cong thanh » dong thanh, cong trinh, cong tan
chieu tinh » trieu tinh, lieu tinh, chau tinh
hieu lang » chieu sang, hieu quang, nhieu tang
tranh xay » trinh xay, trong xay, manh xay
dung cong » dung trong
toan cao » toan ban
toan tap » toan ban

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 tinh)) - canh tranh xay dung cong thanh ((toan cao) OR (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu lang) OR (chieu tinh)) - canh tranh xay dung cong thanh ((toan cao) OR (toan tap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu lang) or (chieu tinh)) - canh tranh xay dung cong thanh ((toan cao) OR (toan tap))".
• Adding a wildcard symbol may retrieve word variants: ho ((hieu lang) or (chieu tinh)) - canh tranh xay dung cong thanh ((toan cao) OR (toan tap))*.