Perhaps you should try some spelling variations:
thanh lap » thanh san, phan lap, thanh hai
sach thu » sach thue, sach thieu, sach tham
thu hang » thi hang, thuc hanh, thu huong
so sach » so sanh, bo sach, co sach
lap cua » lai cua, tap cua, lam cua
toc gia » toc giay, tac gia, quoc gia
hoc gia » hoc giao, hoc giai, quoc gia
va cham » va chat, va tham
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, ma hoa, me hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach thu hang ((ma hoi) or (xa hoi)). hieu va cham ((hoc gia) OR (toc gia)) thanh lap cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach thu hang ((ma hoi) OR (xa hoi)). hieu va cham ((hoc gia) OR (toc gia)) thanh lap cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach thu hang ((ma hoi) or (xa hoi)). hieu va cham ((hoc gia) OR (toc gia)) thanh lap cua tre".
• Adding a wildcard symbol may retrieve word variants: so sach thu hang ((ma hoi) or (xa hoi)). hieu va cham ((hoc gia) OR (toc gia)) thanh lap cua tre*.