Perhaps you should try some spelling variations:
hoc thieu » toc thieu, hoc hien
hanh hang » thanh hang, hang hang, hanh han
ho chieu » theo chieu, doi chieu, mot chieu
va trong » va truong, va thong, va tuong
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan ban » van ban
va tong » va thong, va tuong, va cong

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chieu) or (hoc thieu)) sach - hanh hang ((va tong) OR (va trong)) cong san toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (hoc thieu)) sach - hanh hang ((va tong) OR (va trong)) cong san toan ban*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) or (hoc thieu)) sach - hanh hang ((va tong) OR (va trong)) cong san toan ban*".