Perhaps you should try some spelling variations:
thien van » thi van
thu sach » tu sach, thuat sach, thuoc sach
hieu van » hieu va, lieu va, hieu ve
ban banh » ban hanh, ban anh, ban danh
dieu cua » dieu tra
sach ky » sac ky, sach y, sach ty
xuc ban » duc ban, cuc ban, quoc ban
de cua » le cua, te cua
x hoi » xa hoi, o hoi, x ho

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: thu sach ky nang x hoi. ((hieu van) OR (thien van)) cam xuc ban banh ((de cua) OR (dieu cua)) tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky nang x hoi. ((hieu van) or (thien van)) cam xuc ban banh ((de cua) OR (dieu cua)) tre~".
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang x hoi. ((hieu van) or (thien van)) cam xuc ban banh ((de cua) OR (dieu cua)) tre*.