Perhaps you should try some spelling variations:
hanh trang » thanh trung, canh tranh, minh trang
hanh trinh » canh tranh, hanh chinh
hoc chieu » ho chieu, hoc hien, hoc dieu
hoc thieu » toc thieu, hoc hien
dong cong » duong cong, dung cong, dang cong
cua dong » chua dong, cua cong, cua dang
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than ban » thanh ban, toan ban, than man

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