Perhaps you should try some spelling variations:
hanh trung » thanh trung, hanh trang, manh trung
dong doanh » dung doanh, trong doanh, doanh doanh
kinh sach » sinh sach, tinh sach, chinh sach
dinh sach » sinh sach, tinh sach, chinh sach
trung cua » truong cua, trung tuan, trung cap
cua nhung » va nhung
cong doan » cong dan, cong hoan, cong san

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((kinh sach) OR (dinh sach)) - hanh trung cua nhung ((cong doan) or (dong doanh)) van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((kinh sach) OR (dinh sach)) - hanh trung cua nhung ((cong doan) OR (dong doanh)) van ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((kinh sach) OR (dinh sach)) - hanh trung cua nhung ((cong doan) or (dong doanh)) van ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((kinh sach) OR (dinh sach)) - hanh trung cua nhung ((cong doan) or (dong doanh)) van ban*.