Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thu sach » tu sach, thuat sach, thuoc sach
ly nang » ly hang, ly vang, ly quang
hieu va » lieu va, hieu qua
cao duc » dao duc, cao suc, giao duc
duc van » duc va, duc tan, duc manh
va cao » va cac, va co, va dao
ma cua » manh cua, mang cua
ca cua » co cua
x hoi » xa hoi, o hoi, x ho

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 ((ly nang) OR (ky nang)) x hoi. hieu va cao duc van thanh ((ma cua) or (ca cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((ly nang) OR (ky nang)) x hoi. hieu va cao duc van thanh ((ma cua) OR (ca cua)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ((ly nang) OR (ky nang)) x hoi. hieu va cao duc van thanh ((ma cua) or (ca cua)) triet".
• Adding a wildcard symbol may retrieve word variants: thu sach ((ly nang) OR (ky nang)) x hoi. hieu va cao duc van thanh ((ma cua) or (ca cua)) triet*.