Perhaps you should try some spelling variations:
cham tuc » nham thuc, pham thuc, tham thuc
hoc sac » hoc sach, hoc cac, hoc mac
va cham » va chat, va tham
va danh » va dinh, va dan, dia danh
va hanh » van hanh, va thanh, ban hanh
sac ky » cac ky, sai ky
di cua » doi cua, de cua, do cua
x hoi » xa hoi, o hoi, x ho

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: hoc sac ky nang x hoi. lieu va cham tuc ((va danh) OR (va hanh)) ((di cua) OR (dai cua)) tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sac ky nang x hoi. lieu va cham tuc ((va danh) or (va hanh)) ((di cua) OR (dai cua)) tre~".
• Adding a wildcard symbol may retrieve word variants: hoc sac ky nang x hoi. lieu va cham tuc ((va danh) or (va hanh)) ((di cua) OR (dai cua)) tre*.