Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
vien cac » vien bach, vien dai, vien da
hanh di » hanh vi, hanh de, hang di
xuc van » duc van, luc van, vuc van
vu sach » su sach, vu khach
nang ma » tang ma, sang ma, nang cao
ma hoi » mai hoi, xa hoi, ma hoa
va cam » va cham, va cac, va cao
y nang » ky nang, ly nang, v nang
di cua » dai cua, doi cua, de 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: ((vu sach) OR (vu bach)) y nang ma hoi. hieu ((vien cac) OR (va cam)) xuc van hanh di cua vat~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu sach) OR (vu bach)) y nang ma hoi. hieu ((vien cac) or (va cam)) xuc van hanh di cua vat~".
• Adding a wildcard symbol may retrieve word variants: ((vu sach) OR (vu bach)) y nang ma hoi. hieu ((vien cac) or (va cam)) xuc van hanh di cua vat*.