Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu xanh
chieu sang » chieu xanh, hieu lang, nhieu tang
thuong cap » thong cap, thuong chau, thuong mai
thuong gap » thuong mai, thuong va
phan cong » thanh cong
cong tap » cuong tap, cong tac, cong tan
tap toan » tap doan, tap quan, bai toan
toan tap » toan ban

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 sach) OR (chieu sang)) - thanh ((thuong cap) or (thuong gap)) phan cong tap toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (chieu sang)) - thanh ((thuong cap) OR (thuong gap)) phan cong tap toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sach) OR (chieu sang)) - thanh ((thuong cap) or (thuong gap)) phan cong tap toan tap".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) OR (chieu sang)) - thanh ((thuong cap) or (thuong gap)) phan cong tap toan tap*.