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