Perhaps you should try some spelling variations:
thuoc sach » nuoc sach, thuat sach, thuoc sinh
hoc sach » hoc sinh, hoc cac, hoc anh
kho tang » cao tang
hieu van » hieu va, thien van, lieu va
van chat » cao chat
chat tuc » chat xuc, luat tuc, chat huu
danh sai » dung sai, danh bat, danh dau
tang xa » trang xa, tang ma, lang xa
va danh » va dinh, va dan, va hanh
sai cua » dai cua, hai cua, lai cua
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: ((thuoc sach) or (hoc sach)) kho tang xa hoi. hieu van chat tuc va danh sai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuoc sach) OR (hoc sach)) kho tang xa hoi. hieu van chat tuc va danh sai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((thuoc sach) or (hoc sach)) kho tang xa hoi. hieu van chat tuc va danh sai cua tre*.