Perhaps you should try some spelling variations:
chieu sang » chieu xanh, hieu lang, nhieu tang
chieu sach » chinh sach, chiet tach, chieu xanh
hanh mang » nhanh mang, hanh trang, nhanh lang
dang cong » dung cong
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cau » toan cao, toan ban, toan tap
mang va » mang vua, hang va, bang va
va dang » van dang, va nang, va lang

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)) - hanh mang va dang cong tac toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sang) OR (chieu sach)) - hanh mang va dang cong tac toan cau".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sang) OR (chieu sach)) - hanh mang va dang cong tac toan cau*.