Perhaps you should try some spelling variations:
hanh trung » thanh trung, hanh trang, manh trung
hanh trinh » canh tranh, hanh chinh
hoc chieu » ho chieu, hoc hien, hoc dieu
hoc thieu » toc thieu, hoc hien
dung cong » dung trong
cong bang » cuong bang, dong bang, hong bang
bang than » bang thanh, ban than, sang than
vap dung » van dung, ap dung, va dung
than cap » khan cap, thanh lap, thanh cac

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