Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh trung » thanh trung, hanh trang, manh trung
doi chieu » doc hieu, doi chi, ho chieu
trung cua » truong cua, trung tuan, trung cap
hang cong » dang cong, hang nong, bang cong
dung cong » dung trong
than cao » thai cao, than cap, than sao
toan cao » toan ban, toan tap

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