Perhaps you should try some spelling variations:
thanh lai » thanh hai, thanh lap, thanh loi
doc sach » hoc sach, nuoc sach, dac sac
toc sach » hoc sach, thuoc sach, nuoc sach
va thanh » gia thanh, ban thanh, va tinh
lai cua » dai cua, hai cua, lai chau
cac tuc » cac toc, cac tu, cac tac
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
cua tre » cua te, cuu tre, cua triet
nang xa » nang x, nang ma, mang xa
tuc va » thuc va, truc va, tuc xa

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doc sach) OR (toc sach)) thu ((nang xa) or (lang xa)) hoi. hieu va cac tuc va thanh lai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc sach) OR (toc sach)) thu ((nang xa) OR (lang xa)) hoi. hieu va cac tuc va thanh lai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doc sach) OR (toc sach)) thu ((nang xa) or (lang xa)) hoi. hieu va cac tuc va thanh lai cua tre".
• Adding a wildcard symbol may retrieve word variants: ((doc sach) OR (toc sach)) thu ((nang xa) or (lang xa)) hoi. hieu va cac tuc va thanh lai cua tre*.