Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hanh de » hanh ve
cua tre » cua te, cuu tre, cua triet
va chat » van chat, va phat, cao chat
uoc va » nuoc va, duoc va, quoc va
y nang » ky nang, ly nang, v nang
loc va » hoc va, luc va
nang o » nang co, nang ho, nang ro
o hoi » co hoi, o hoc, o hai

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 y nang o hoi. lieu va chat ((uoc va) or (loc va)) ((hanh de) OR (hanh kem)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y nang o hoi. lieu va chat ((uoc va) OR (loc va)) ((hanh de) OR (hanh kem)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y nang o hoi. lieu va chat ((uoc va) or (loc va)) ((hanh de) OR (hanh kem)) cua tre".
• Adding a wildcard symbol may retrieve word variants: thu sach y nang o hoi. lieu va chat ((uoc va) or (loc va)) ((hanh de) OR (hanh kem)) cua tre*.