Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
chat duc » chat xuc, chat doc, chet duoc
hanh dai » hanh tai, hanh dao, vanh dai
xang xa » lang xa, mang xa, ang xa
hieu va » lieu va, hieu qua
va chat » van chat, va phat, cao chat
va hanh » van hanh, va thanh, va danh
cua te » cua tu

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 xang xa hoi. hieu va chat duc va hanh dai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) ty xang xa hoi. hieu va chat duc va hanh dai cua te.
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (toc sach)) ty xang xa hoi. hieu va chat duc va hanh dai cua te*.