Perhaps you should try some spelling variations:
chieu sang » chieu xanh, hieu lang, nhieu tang
chieu sach » chinh sach, chiet tach, chieu xanh
cong thanh » dong thanh, cong trinh, cong tan
dung cong » dung trong
tranh va » tranh van, trang va, trinh va
toan ban » van ban
va dung » van dung, va duong, vat dung

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu sang) OR (chieu sach)) - canh tranh va dung cong thanh ((toan tap) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sang) OR (chieu sach)) - canh tranh va dung cong thanh ((toan tap) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sang) OR (chieu sach)) - canh tranh va dung cong thanh ((toan tap) or (toan ban))".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sang) OR (chieu sach)) - canh tranh va dung cong thanh ((toan tap) or (toan ban))*.