Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
luu tre » luu tru, cuu tre, luy tre
soc van » hoc van, oc van, sac van
va quan » van quan, tac quan, hai quan
va tuan » van tuan, va toan, a tuan
ky danh » ky anh
ky dang » ky nang
tay ho » tay co, tay o, tay khao
vi luu » vi lua
te sac » te sach, te cac, te san

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: te sac ((ky dang) OR (ky danh)) tay ho. hieu ((va tuan) OR (va quan)) soc van hanh vi luu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ((ky dang) OR (ky danh)) tay ho. hieu ((va tuan) or (va quan)) soc van hanh vi luu tre~".
• Adding a wildcard symbol may retrieve word variants: te sac ((ky dang) OR (ky danh)) tay ho. hieu ((va tuan) or (va quan)) soc van hanh vi luu tre*.