Perhaps you should try some spelling variations:
cach thuc » anh thuc, cac thu
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
van cach » va cach, van canh, vat cach
thuc ban » thuoc ban, thuc dan, thu ban
ban dinh » ban tinh, van dinh, ban dich
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
dinh du » dinh duc, dinh cu, dinh tu
du cua » duy cua, dau cua, dum cua
x hoi » o hoi, x ho, 5 hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky nang ((x hoi) or (xa hoi)). hieu van cach thuc ban dinh du cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang ((x hoi) OR (xa hoi)). hieu van cach thuc ban dinh du cua triet.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang ((x hoi) or (xa hoi)). hieu van cach thuc ban dinh du cua triet*.