Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
dai cuu » dai cua, dai huu
va hanh » van hanh, va thanh, va danh
va vanh » va van, va danh, va anh
qua cam » qua cham, qua cac, qua ca
ty hang » ly hang, ty xang, thi hang
cuu tre » cua tre, cau tren, cau treo
hang x » nang x, hoang xa, chang xu
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) or (toc sach)) ty hang x hoi. hieu qua cam xuc ((va vanh) OR (va hanh)) dai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) ty hang x hoi. hieu qua cam xuc ((va vanh) OR (va hanh)) dai cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (toc sach)) ty hang x hoi. hieu qua cam xuc ((va vanh) OR (va hanh)) dai cuu tre*".