Perhaps you should try some spelling variations:
vien cac » vien bach, vien dai, vien da
van hanh » van thanh, ban hanh, van anh
vu sach » vu bach, su sach, vu khach
va cham » va chat, va tham
nang ma » tang ma, sang ma, nang cao
hanh di » hanh vi, hanh de, hang di
xuc van » duc van, luc van, vuc van
di cua » dai cua, doi cua, de cua
va cam » va cac, va cao, va cai
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa

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: vu sach y nang ma hoi. hieu ((vien cac) OR (((va cam) OR (va cham)))) xuc van hanh di cua vat~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach y nang ma hoi. hieu ((vien cac) or (((va cam) OR (va cham)))) xuc van hanh di cua vat~".
• Adding a wildcard symbol may retrieve word variants: vu sach y nang ma hoi. hieu ((vien cac) or (((va cam) OR (va cham)))) xuc van hanh di cua vat*.