Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
lai cua » dai cua, hai cua, lai chau
va hanh » van hanh, va thanh, ban hanh
va danh » va dinh, va dan, dia danh
van cau » van dau, van hau, van chat
sach ky » sac ky, sach y, sach ty
van cam » van nam, van lam, van dam
sang xa » song xa, lang xa, sang ma
ky sang » ky nang, ky dang, ky tang
cua tre » cua te, cuu tre, cua triet

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 ky sang xa hoi. hieu ((van cam) OR (van cau)) duc ((va danh) or (va hanh)) lai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ky sang xa hoi. hieu ((van cam) OR (van cau)) duc ((va danh) OR (va hanh)) lai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ky sang xa hoi. hieu ((van cam) OR (van cau)) duc ((va danh) or (va hanh)) lai cua tre*".