Perhaps you should try some spelling variations:
chieu sang » chieu xanh, nhieu tang
chieu sach » chinh sach, chiet tach, chieu xanh
thong cong » trong cong, tong cong, thong thong
hieu lang » hieu quang, nhieu tang, hieu van
hanh mang » nhanh mang, hanh trang, nhanh lang
va thong » va thuong, va phuong, he thong
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan cau » toan cao, toan ban, toan tap
mang va » mang vua, hang va, bang va

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))) or (hieu lang)) - hanh mang va thong cong san toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((((chieu sang) OR (chieu sach))) OR (hieu lang)) - hanh mang va thong cong san toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((((chieu sang) OR (chieu sach))) or (hieu lang)) - hanh mang va thong cong san toan cau".
• Adding a wildcard symbol may retrieve word variants: theo ((((chieu sang) OR (chieu sach))) or (hieu lang)) - hanh mang va thong cong san toan cau*.