Perhaps you should try some spelling variations:
thanh thuong » thanh huong, thanh chuong, khanh thuong
thanh phuong » thanh huong, thanh chuong, khanh phong
chieu sang » chieu sach, chieu xanh, hieu lang
hieu quan » hieu qua, lieu quan, thien quan
dung cong » dung trong
cua dung » cua dang, cua dong, qua dung
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cau » toan cao, toan ban, toan tap

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 quan)) - ((thanh thuong) OR (thanh phuong)) cua dung cong dan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sang) OR (hieu quan)) - ((thanh thuong) OR (thanh phuong)) cua dung cong dan toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sang) or (hieu quan)) - ((thanh thuong) OR (thanh phuong)) cua dung cong dan toan cau".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sang) or (hieu quan)) - ((thanh thuong) OR (thanh phuong)) cua dung cong dan toan cau*.