Perhaps you should try some spelling variations:
qua van » quan van, qua ban, qua san
van tuc » van thuc, van tu, van duc
va hanh » van hanh, va thanh, va danh
su sac » su sach, su cac, su xac
sac ky » cac ky, sai ky
tuc va » thuc va, truc va, tuc xa
va cau » van cau, va dau, va cao
x hoi » xa hoi, o hoi, x ho

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ky nang x hoi. hieu qua van tuc va hanh ((va cau) OR (va cac)) theo~".
• Adding a wildcard symbol may retrieve word variants: su sac ky nang x hoi. hieu qua van tuc va hanh ((va cau) OR (va cac)) theo*.