Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
nang ma » tang ma, sang ma, mang may
day cua » dai cua
dat cua » dai cua, mat cua, dan cua
hieu va » lieu va, hieu qua
nam xuc » cam xuc, nam xua, nam thuc
xuc ban » duc ban, cuc ban, quoc ban
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
va nam » van nam, ha nam, va nay

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 sac ky ((nang ma) OR (nang cao)) hoi. hieu va nam xuc ban thanh ((dat cua) OR (day cua)) triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky ((nang ma) or (nang cao)) hoi. hieu va nam xuc ban thanh ((dat cua) OR (day cua)) triet~".
• Adding a wildcard symbol may retrieve word variants: tu sac ky ((nang ma) or (nang cao)) hoi. hieu va nam xuc ban thanh ((dat cua) OR (day cua)) triet*.