Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
chiet tach » chieu sach
thanh tung » thanh cong
tung qua » dung qua, tuong quan, trung quan
qua dung » quang dung, su dung, qua song
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
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: doi ((chieu sang) or (chiet tach)) - thanh tung qua dung ((cong dan) OR (cong san)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu sang) OR (chiet tach)) - thanh tung qua dung ((cong dan) OR (cong san)) toan cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu sang) or (chiet tach)) - thanh tung qua dung ((cong dan) OR (cong san)) toan cau*".