Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
hanh trinh » hanh chinh
bang huong » bang phuong, ban huong, bang suong
hoc thieu » toc thieu, hoc hien
cua bang » chua bang, cua ban, cua dang
dan toan » van toan, dan than, manh toan
toan tap » toan 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 thieu sach - ((canh tranh) or (hanh trinh)) cua bang huong dan toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - ((canh tranh) OR (hanh trinh)) cua bang huong dan toan tap*.