Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
doi chieu » doc hieu, doi chi, ho chieu
tung tam » trung tam, dung tam, tuong tac
vung tam » vung tau, vung tay, trung tam
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu sach - thanh ((tung tam) OR (vung tam)) trong cong tan toan ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sach - thanh ((tung tam) OR (vung tam)) trong cong tan toan ban".
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - thanh ((tung tam) OR (vung tam)) trong cong tan toan ban*.