Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
quoc ban » quoc bao, quoc lan, quoc quan
sach ty » sach y, sach tu, sach thu
ty danh » ty doanh, ty anh, ky danh
cho hoc » co hoc, khoa hoc
hieu ve » hieu va, hieu van
xuc ban » cuc ban, xuat ban, buoc ban
duc ban » duc tan, duc van, dua ban
hanh di » hanh vi, hanh de, hang di
cua cau » cua cac, cua chu, cua cay
ve cac » va cac, vien cac
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ty danh cho hoc. hieu ve cac ((((xuc ban) or (quoc ban))) or (duc ban)) hanh di cua cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ty danh cho hoc. hieu ve cac ((((xuc ban) OR (quoc ban))) OR (duc ban)) hanh di cua cau*.