Perhaps you should try some spelling variations:
cham tuc » nham thuc, pham thuc, tham thuc
su sach » so sach, vu sach
va danh » va dinh, va dan, va hanh
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
ty hang » ly hang, ty xang, thi hang
ty nang » ky nang, ty xang, ly nang
tuc va » thuc va, truc va, tuc xa

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: su sach ((ty nang) OR (ty hang)) xa hoi. hieu ve cham tuc va danh ((le cua) OR (ly cua)) te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ty nang) OR (ty hang)) xa hoi. hieu ve cham tuc va danh ((le cua) or (ly cua)) te~".
• Adding a wildcard symbol may retrieve word variants: su sach ((ty nang) OR (ty hang)) xa hoi. hieu ve cham tuc va danh ((le cua) or (ly cua)) te*.