Perhaps you should try some spelling variations:
hanh trang » thanh trung, canh tranh, hanh trinh
hien sach » dien sach, thien hach, chieu sach
kien sach » dien sach, vien bach, kien mac
trang qua » trong qua, trong quan, trang tuan
qua dung » quang dung, su dung, qua song
cong san » cong tac
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hien sach) OR (kien sach)) - hanh trang qua dung ((huong dan) or (cong san)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien sach) OR (kien sach)) - hanh trang qua dung ((huong dan) OR (cong san)) toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien sach) OR (kien sach)) - hanh trang qua dung ((huong dan) or (cong san)) toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien sach) OR (kien sach)) - hanh trang qua dung ((huong dan) or (cong san)) toan ban*.