Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
hanh ma » hanh mau, hanh may, hanh va
hieu va » lieu va, hieu qua
nang xa » lang xa, nang ma, mang xa
sai ky » sac ky
xuc va » duc va, tuc va, xac va
luc va » duc va, tuc va, loc va
tu sai » tu bai, tu san, tu cai
ma va » ma van, mua va, me va

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: tu sai ky ((nang xa) OR (nang x)) hoi. hieu va cac ((xuc va) OR (luc va)) hanh ma va triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sai ky ((nang xa) or (nang x)) hoi. hieu va cac ((xuc va) OR (luc va)) hanh ma va triet~".
• Adding a wildcard symbol may retrieve word variants: tu sai ky ((nang xa) or (nang x)) hoi. hieu va cac ((xuc va) OR (luc va)) hanh ma va triet*.