Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu sach, chieu xanh, nhieu tang
ngang toan » nganh toan, dang toan
quang toan » quang tuan, quang tran, quang doan
hieu lang » hieu quang, nhieu tang, hieu van
dong cong » duong cong, dung cong, dang cong
tam dong » tam duong, tac dong, lam dong

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chieu sang) or (hieu lang)) - thanh trung tam dong cong ((ngang toan) OR (quang toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sang) OR (hieu lang)) - thanh trung tam dong cong ((ngang toan) OR (quang toan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sang) or (hieu lang)) - thanh trung tam dong cong ((ngang toan) OR (quang toan)) cau".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sang) or (hieu lang)) - thanh trung tam dong cong ((ngang toan) OR (quang toan)) cau*.