Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
thanh hong » thanh huong, thanh hoang, thanh cong
hoc thieu » toc thieu, hoc hien
ung phong » rung phong, dung phong, nung phong
phong bai » thong bai, phong ban, phong cai
bai toan » bai tap
toan ban » van ban
hong va » thong va, phong va, hong van

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((theo chieu) or (hoc thieu)) sach - thanh hong va ung phong bai toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (hoc thieu)) sach - thanh hong va ung phong bai toan ban*.