Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
chat huu » pham huu
van hanh » ban hanh, van anh, van ban
tu sach » thu sach, su sach, te sach
va chat » van chat, va phat, cao chat
vai cua » dai cua, lai cua, bai cua
hai cua » thai cua, dai cua, hoi cua
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.

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