Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
cau xuc » cam xuc, cau luc, cau truc
vai cuu » vai cua
sach ky » sac ky, sach y, sach ty
cuu tre » cua tre, cau tren, cau treo
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
ky lang » ky nang, ky dang, ky tang
va cau » van cau, va cac, va dau
ca dan » cac dan, ca dao
va dao » ca dao
va dan » va dau, va dap, va dai

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 lang xa hoi. hieu va cau xuc ((((va dan) OR (ca dan))) or (va dao)) vai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ky lang xa hoi. hieu va cau xuc ((((va dan) OR (ca dan))) OR (va dao)) vai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ky lang xa hoi. hieu va cau xuc ((((va dan) OR (ca dan))) or (va dao)) vai cuu tre".
• Adding a wildcard symbol may retrieve word variants: toc sach ky lang xa hoi. hieu va cau xuc ((((va dan) OR (ca dan))) or (va dao)) vai cuu tre*.