Perhaps you should try some spelling variations:
ban hanh » ban hang
nam thuc » nam thuoc, am thuc, nam thu
thuc ban » thuoc ban, thuc dan, thu ban
nang xa » nang x, lang xa, nang ma
hieu ha » hieu hoa, hieu va, hieu xa
hai cua » thai cua, dai cua, hoi cua
bai cua » ban cua, dai cua, bai ca
hieu ca » hieu cac, hieu cua, hieu va
vu sac » vu sach, vu san, va sac
sac ky » cac ky, sai ky

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 nang xa hoi. ((hieu ha) OR (hieu ca)) nam thuc ban hanh ((bai cua) OR (hai cua)) triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sac ky nang xa hoi. ((hieu ha) OR (hieu ca)) nam thuc ban hanh ((bai cua) or (hai cua)) triet~".
• Adding a wildcard symbol may retrieve word variants: vu sac ky nang xa hoi. ((hieu ha) OR (hieu ca)) nam thuc ban hanh ((bai cua) or (hai cua)) triet*.