Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
hieu cao » chieu cao, hieu cac, hieu ca
chat duc » chat xuc, chat doc, chet duoc
vu dang » su dang, vu quang, cua dang
dang xa » dang xay, lang xa, dang ha
cua tre » cua te, cuu tre, cua triet
va dao » ca dao
dao vi » dao voi, dao ve, dao va
vi cua » vai cua, di cua

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