Perhaps you should try some spelling variations:
hanh trung » thanh trung, hanh trang, manh trung
hoc thieu » hoc hien
trung cua » truong cua, trung tuan, trung cap
cua nhung » va nhung
cong tan » cong san, cong thanh, cong ty
cong tac » cong ty
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: ((hoc thieu) or (toc thieu)) sach - hanh trung cua nhung ((cong tan) OR (cong tac)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (toc thieu)) sach - hanh trung cua nhung ((cong tan) OR (cong tac)) toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc thieu) or (toc thieu)) sach - hanh trung cua nhung ((cong tan) OR (cong tac)) toan cao".
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) or (toc thieu)) sach - hanh trung cua nhung ((cong tan) OR (cong tac)) toan cao*.