Perhaps you should try some spelling variations:
ban hanh » ban hang
te sach » toc sach
hieu ve » hieu va, hieu van
cac xuc » cam xuc, cac nuoc, chat xuc
xuc ban » duc ban, cuc ban, quoc ban
doi cua » dai cua, hoi cua, dong cua
y nang » ly nang, v nang, may nang
ve cac » va cac, vien cac
de cua » le cua, te cua, dieu 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: te sach ((y nang) OR (ky nang)) xa hoi. hieu ve cac xuc ban hanh ((de cua) OR (doi cua)) tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((y nang) OR (ky nang)) xa hoi. hieu ve cac xuc ban hanh ((de cua) or (doi cua)) tre~".
• Adding a wildcard symbol may retrieve word variants: te sach ((y nang) OR (ky nang)) xa hoi. hieu ve cac xuc ban hanh ((de cua) or (doi cua)) tre*.