Perhaps you should try some spelling variations:
thieu sach » chieu sach, hieu cach, theo sach
thien hach » thien thanh, hien hanh
hanh trang » thanh trung, canh tranh, hanh trinh
trang cua » tranh cua, tang cua, trung cua
cua nhung » va nhung
cong tan » cong tac, cong thanh, cong ty
cong san » cong tac

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

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