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