Perhaps you should try some spelling variations:
vu sach » vu bach, su sach, vu khach
hanh di » hanh vi, hanh de, hang di
va hanh » van hanh, va thanh, va danh
sach ky » sac ky, sach y, sach ty
mai hoi » mai khoi, dai hoi, lai hoi
ve cam » ve cham, ve cac, ve cai
va cam » va cham, va cac, va cao
xuc va » duc va, tuc va, luc va
ma hoi » xa hoi, ma hoa, me hoi
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 ky nang ((ma hoi) OR (mai hoi)). hieu ((ve cam) OR (va cam)) xuc va hanh di cua vat~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ky nang ((ma hoi) OR (mai hoi)). hieu ((ve cam) or (va cam)) xuc va hanh di cua vat~".
• Adding a wildcard symbol may retrieve word variants: vu sach ky nang ((ma hoi) OR (mai hoi)). hieu ((ve cam) or (va cam)) xuc va hanh di cua vat*.