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

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