Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
truc va » thuc va, thuc vat, trung va
y nang » ky nang, ly nang, v nang
ve cac » va cac, vien cac
vi cau » va cau, ve cau, di cau
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: su sach y nang x hoi. hieu ve cac ((((tuc xa) OR (duc va))) OR (truc va)) hanh vi cau tren~.
• Adding a wildcard symbol may retrieve word variants: su sach y nang x hoi. hieu ve cac ((((tuc xa) or (duc va))) or (truc va)) hanh vi cau tren*.