Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
trinh nham » trinh nha, trinh cham, trinh nhap
hoc chieu » hoc thieu, ho chieu, hoc hien
nham thuc » nhan thuc, nam thuc, nham thu
thuc hung » thuc chung, thuc nhung, thuc dung
cong tang » cong thang, cong lang, cong bang
cong vang » cong lang, cong quang, cong ngang
cong tan » cong tac, cong san, cong thanh

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu sach - trinh nham thuc hung ((cong tan) OR (((cong tang) OR (cong vang)))) phan tu~".
• Adding a wildcard symbol may retrieve word variants: hoc chieu sach - trinh nham thuc hung ((cong tan) OR (((cong tang) OR (cong vang)))) phan tu*.