Perhaps you should try some spelling variations:
bach ky » bac ky
va tinh » may tinh
cac luc » cau luc, coc luc, cac nuoc
ky dang » ky nang, ky danh
hieu ve » hieu va, hieu van
tay hoi » tay ho, tao hoi, tay thai
xay hoi » xa hoi, cay phoi, gay thoi
luc va » duc va, tuc va, loc va
va cua » va chua, via cua, ma cua
ca cua » co cua
ve cac » va cac, vien cac

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 bach ky dang ((xay hoi) OR (tay hoi)). hieu ve cac luc va tinh ((va cua) OR (ca cua)) tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu bach ky dang ((xay hoi) OR (tay hoi)). hieu ve cac luc va tinh ((va cua) or (ca cua)) tre~".
• Adding a wildcard symbol may retrieve word variants: vu bach ky dang ((xay hoi) OR (tay hoi)). hieu ve cac luc va tinh ((va cua) or (ca cua)) tre*.