Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
thu sach » tu sach, thuat sach, thuoc sach
va danh » va dan, va hanh, dia danh
va dinh » van dinh, va kinh, va tinh
ty nang » ky nang, ty hang, ly nang
sai cua » dai cua, hai cua, lai cua
van cau » van dau, van hau, van chat

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ((ty nang) OR (ty xang)) xa hoi. hieu van cau truc ((va danh) or (va dinh)) sai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((ty nang) OR (ty xang)) xa hoi. hieu van cau truc ((va danh) OR (va dinh)) sai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ((ty nang) OR (ty xang)) xa hoi. hieu van cau truc ((va danh) or (va dinh)) sai cua triet".
• Adding a wildcard symbol may retrieve word variants: thu sach ((ty nang) OR (ty xang)) xa hoi. hieu van cau truc ((va danh) or (va dinh)) sai cua triet*.