Perhaps you should try some spelling variations:
dang xay » dang van, van xay
cac duc » cac du, cao duc, cac dac
va chua » vua chua, ca chua, va chu
va tinh » may tinh
hieu va » lieu va, hieu qua
hieu ve » hieu van
xay hoi » xa hoi, tay hoi, cay phoi
ky dang » ky nang, ky danh
sac ky » cac ky, sai ky
ca cua » co cua
vu sac » vu sach, vu san, va sac

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