Perhaps you should try some spelling variations:
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
ky dang » ky nang, ky danh
dang xa » dang xay, lang xa, dang ha
hieu va » lieu va, hieu qua
cau tuc » cau truc, cau tu, cau luc
va danh » va dinh, va hanh, dia danh
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
va cau » van cau, va cac, va dau
va dan » ca dan, va dao, va dau

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 ky dang xa hoi. hieu va cau tuc ((va danh) OR (va dan)) vai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ky dang xa hoi. hieu va cau tuc ((va danh) OR (va dan)) vai cua tre".
• Adding a wildcard symbol may retrieve word variants: so sach ky dang xa hoi. hieu va cau tuc ((va danh) OR (va dan)) vai cua tre*.