Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu sach, chieu xanh, nhieu tang
hieu lang » hieu quang, nhieu tang, hieu van
trung xay » trong xay, trung gay, trung tam
dung cong » dung trong
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
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: doc ((hieu lang) OR (chieu sang)) - thanh trung xay dung cong dan than cap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((hieu lang) OR (chieu sang)) - thanh trung xay dung cong dan than cap".
• Adding a wildcard symbol may retrieve word variants: doc ((hieu lang) OR (chieu sang)) - thanh trung xay dung cong dan than cap*.