Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
trinh luan » trinh luat, trinh quan, trinh han
tieu sach » chieu sach, dien sach, te sach
luan hang » luan nang, luan han, luan hung
hang cong » dang cong, hang nong, bang cong
cong manh » cong danh, duong manh, cong thanh
toan cao » toan tap
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: theo tieu sach - hanh trinh luan hang cong manh ((toan cao) OR (toan ban))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo tieu sach - hanh trinh luan hang cong manh ((toan cao) OR (toan ban))".
• Adding a wildcard symbol may retrieve word variants: theo tieu sach - hanh trinh luan hang cong manh ((toan cao) OR (toan ban))*.