Perhaps you should try some spelling variations:
toc sach » doc sach, thuoc sach, nuoc sach
danh lai » danh sai, gianh lai, dinh lam
chat tuc » chat xuc, luat tuc, chat huu
lieu van » hieu van, sieu van, lieu nano
hoc sach » hoc sinh, hoc cac, hoc anh
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
va danh » va dinh, va dan, va hanh
lai cua » dai cua, hai cua, lai chau
cua tre » cua te, cuu tre, cua triet
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: ((toc sach) or (hoc sach)) ky lang xa hoi. ((lieu van) or (lieu va)) chat tuc va danh lai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (hoc sach)) ky lang xa hoi. ((lieu van) OR (lieu va)) chat tuc va danh lai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((toc sach) or (hoc sach)) ky lang xa hoi. ((lieu van) or (lieu va)) chat tuc va danh lai cua tre*.