Perhaps you should try some spelling variations:
hanh trang » thanh trung, canh tranh, hanh trinh
doi chieu » doc hieu, doi chi, mot chieu
trang cua » tranh cua, tang cua, trung cua
cua nhung » va nhung
ho chieu » theo chieu, hoc thieu, mot chieu
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
gian nan » gian dan, gian lan, gian van

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doi chieu) OR (ho chieu)) sach - hanh trang cua nhung ((cong dan) or (cong tan)) gian nan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (ho chieu)) sach - hanh trang cua nhung ((cong dan) OR (cong tan)) gian nan.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chieu) OR (ho chieu)) sach - hanh trang cua nhung ((cong dan) or (cong tan)) gian nan".
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) OR (ho chieu)) sach - hanh trang cua nhung ((cong dan) or (cong tan)) gian nan*.