Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
lam duoc » nam duoc, luat duoc, lam thuoc
hieu van » hieu va, thien van, lieu va
dang van » hoang van, hang va
vai cua » dai cua, hai cua, lai cua
dan vai » dan va, dan tai, dan vat
duoc va » nuoc va, duc va, duoc ma
van lam » van nam
lang xa » lang ha, dang xay, lang van
cua tre » cua te, cuu tre, cua triet
va dan » ca dan, va dao, va dau

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)) ky ((lang xa) OR (dang van)) hoi. hieu van lam duoc va dan vai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) OR (toc sach)) ky ((lang xa) OR (dang van)) hoi. hieu van lam duoc va dan vai cua tre".
• Adding a wildcard symbol may retrieve word variants: ((te sach) OR (toc sach)) ky ((lang xa) OR (dang van)) hoi. hieu van lam duoc va dan vai cua tre*.