Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thu sach » tu sach, thuat sach, thuoc sach
va thanh » gia thanh, va tinh, le thanh
cam duc » cam xuc, cao duc, nam duoc
san cua » sang cua, ban cua, dan cua
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
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 ((cam duc) or (pham duc)) ((va thanh) OR (ban thanh)) san cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y nang o hoi. lieu va ((cam duc) OR (pham duc)) ((va thanh) OR (ban thanh)) san cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y nang o hoi. lieu va ((cam duc) or (pham duc)) ((va thanh) OR (ban thanh)) san cua tre".
• Adding a wildcard symbol may retrieve word variants: thu sach y nang o hoi. lieu va ((cam duc) or (pham duc)) ((va thanh) OR (ban thanh)) san cua tre*.