Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hoc chieu » hoc thieu, ho chieu, hoc hien
trung cua » truong cua, trung tuan, trung cap
truong ca » truong cao, truong va, trong ca
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
gian ban » gian bana, gian dan, gian lan

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 cua) or (truong ca)) thong ((cong dan) OR (cong tan)) gian ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sach - hanh ((trung cua) OR (truong ca)) thong ((cong dan) OR (cong tan)) gian ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu sach - hanh ((trung cua) or (truong ca)) thong ((cong dan) OR (cong tan)) gian ban".
• Adding a wildcard symbol may retrieve word variants: hoc chieu sach - hanh ((trung cua) or (truong ca)) thong ((cong dan) OR (cong tan)) gian ban*.