Perhaps you should try some spelling variations:
thien van » thi van
ban thanh » ban hanh, ban hang
lam duoc » nam duoc, luat duoc, lam thuoc
duoc ban » duc ban, quoc ban, buoc ban
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
van lam » van nam
tai cua » thai cua, dai cua, hai cua

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 ky nang xa hoi. thien van lam duoc ban thanh ((((tai cua) OR (tri cua))) OR (tai cuc)) tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang xa hoi. thien van lam duoc ban thanh ((((tai cua) OR (tri cua))) or (tai cuc)) tre~".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. thien van lam duoc ban thanh ((((tai cua) OR (tri cua))) or (tai cuc)) tre*.