Perhaps you should try some spelling variations:
toc sach » doc sach, thuoc sach, nuoc sach
lang van » dang van, tang van, hoang van
hoc sach » hoc sinh, hoc cac, hoc anh
chat xuc » chat huu, cam xuc, chao xu
nang di » nang du, hang di, nang ji
va nang » van nang, da nang, cam nang
va chat » van chat, va phat, cao chat
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay
cua tre » cua te, cuu tre, cua triet
xuc va » duc va, tuc va, luc va
di cua » dai cua, doi cua, de cua

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

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