Perhaps you should try some spelling variations:
chieu sang » chieu xanh, hieu lang, nhieu tang
chieu sach » chinh sach, chiet tach, chieu xanh
manh vung » manh hung, manh tung, manh dung
dung cong » dung trong
vung tam » vung tau, vung tay, trung tam
tam dung » tam duong, tac dung, tan dung
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
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: theo ((chieu sang) OR (chieu sach)) - manh vung tam dung cong tac toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sang) OR (chieu sach)) - manh vung tam dung cong tac toan cau".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sang) OR (chieu sach)) - manh vung tam dung cong tac toan cau*.