Perhaps you should try some spelling variations:
chieu sang » chieu xanh, hieu lang, nhieu tang
chieu sach » chinh sach, chiet tach, chieu xanh
danh thanh » dinh thanh, dang thanh, nhanh thanh
thanh qua » thanh quan, thanh qui, hanh qua
dung cong » dung trong
qua dung » quang dung, su dung, qua song
cong dan » cong san, cong tan, huong dan
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 (chieu sach)) - danh thanh qua dung cong dan ((phan tu) or (toan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu sang) OR (chieu sach)) - danh thanh qua dung cong dan ((phan tu) OR (toan cau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu sang) OR (chieu sach)) - danh thanh qua dung cong dan ((phan tu) or (toan cau))".
• Adding a wildcard symbol may retrieve word variants: doi ((chieu sang) OR (chieu sach)) - danh thanh qua dung cong dan ((phan tu) or (toan cau))*.