Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, nhieu tang
thanh tung » thanh cong
hieu lang » hieu quang, nhieu tang, hieu van
cong cong » cong dong, trong cong, dung cong
tung cao » nung cao, truong cao, trung cap
cao cong » cac cong, cao dang, cua cong
cong san » cong tac
quan cau » quang cao, quan ha, quan cua
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 lang)) - thanh tung cao cong cong san ((quan cau) or (toan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sang) OR (hieu lang)) - thanh tung cao cong cong san ((quan cau) OR (toan cau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sang) OR (hieu lang)) - thanh tung cao cong cong san ((quan cau) or (toan cau))".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sang) OR (hieu lang)) - thanh tung cao cong cong san ((quan cau) or (toan cau))*.