Perhaps you should try some spelling variations:
hanh trung » thanh trung, hanh trang, manh trung
trung cua » truong cua, trung tuan, trung cap
cong cong » trong cong, dung cong, dang cong
doc hieu » toc thieu, hoc thieu, hoc hien
ho chieu » theo chieu, hoc thieu, doi chieu
tac doan » tap doan, tan doan, thai doan
doan cao » doanh cao, toan cao, doan cap

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

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