Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hieu nganh » vien nganh, hiem ngan, hieu manh
hanh trung » thanh trung, hanh trang, manh trung
trung cua » truong cua, trung tuan, trung cap
hang cong » dang cong, hang nong, bang cong
thanh cac » hanh cac, thanh bac, tranh cac
cua hang » cua dang, cua nhung, cua cong
cong van » cong vang, cong san, song van
thanh ca » thanh cha, thanh ha, thanh va

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