Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
nhung cong » dung cong, thong cong, hang cong
hoc chieu » hoc thieu, ho chieu, hoc hien
trinh vit » trinh viet, trinh vat, trinh vuot
trinh vi » trinh va, trinh ve, trinh viet
cong ban » cong bang, cong san, cong tan
phan tap » phan lap, pha tap, phan tu
han tap » han tai, toan tap, nhan tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc chieu sach - hanh ((trinh vi) or (trinh vit)) nhung cong ban ((phan tap) OR (han tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sach - hanh ((trinh vi) OR (trinh vit)) nhung cong ban ((phan tap) OR (han tap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu sach - hanh ((trinh vi) or (trinh vit)) nhung cong ban ((phan tap) OR (han tap))".
• Adding a wildcard symbol may retrieve word variants: hoc chieu sach - hanh ((trinh vi) or (trinh vit)) nhung cong ban ((phan tap) OR (han tap))*.