Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hanh dai » hanh tai, hanh dao, vanh dai
sach ky » sac ky, sach y, sach ty
va cham » va chat
va tham » van tham, va thanh, va thuat
cua tre » cua te, cuu tre, cua triet
goc va » hoc va, doc va, uoc va
loc va » hoc va, luc va
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ky nang x hoi. lieu ((va cham) OR (va tham)) ((goc va) or (loc va)) hanh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang x hoi. lieu ((va cham) OR (va tham)) ((goc va) OR (loc va)) hanh dai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky nang x hoi. lieu ((va cham) OR (va tham)) ((goc va) or (loc va)) hanh dai cua tre".
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang x hoi. lieu ((va cham) OR (va tham)) ((goc va) or (loc va)) hanh dai cua tre*.