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
trung cam » trung tam, trung cap, trung ca
trung nam » trung tam, trong nam, trung cap
cong ban » cong bang, cong san, cong tan
ban khan » ban than, ban nhan, ban chan
khan cap » khan ap, than cap, khoan cam

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 ((trung cam) OR (trung nam)) nhung cong ban khan cap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu sach - hanh ((trung cam) OR (trung nam)) nhung cong ban khan cap".
• Adding a wildcard symbol may retrieve word variants: hoc chieu sach - hanh ((trung cam) OR (trung nam)) nhung cong ban khan cap*.