Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
trinh quan » tinh quang, trinh luat, trinh han
quan nhung » qua nhung, cua nhung, luan chung
cuong danh » cuon danh, huong dan, cuong linh
hoc kien » hoc hien, hoc vien, hoc lien
hoa kien » hoa bien, hoa hien, hoa dien
cong dan » cong san, cong tan, huong dan
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 kien) OR (hoa kien)) sach - hanh trinh quan nhung ((cong dan) or (cuong danh)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc kien) OR (hoa kien)) sach - hanh trinh quan nhung ((cong dan) OR (cuong danh)) toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc kien) OR (hoa kien)) sach - hanh trinh quan nhung ((cong dan) or (cuong danh)) toan ban".
• Adding a wildcard symbol may retrieve word variants: ((hoc kien) OR (hoa kien)) sach - hanh trinh quan nhung ((cong dan) or (cuong danh)) toan ban*.