Perhaps you should try some spelling variations:
cua triet » su triet, va triet
thu sach » tu sach, thuat sach, thuoc sach
cua viet » ca viet, hoa viet, cua vat
hieu ve » hieu va, hieu van
y nang » ky nang, ly nang, v nang
ve bac » ve bao, ve cac, ve ban
bo van » vo van, do van, ho van
so van » su van, vo van
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: thu sach y nang x hoi. hieu ve bac ((bo van) OR (so van)) hanh vi ((cua triet) OR (cua viet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y nang x hoi. hieu ve bac ((bo van) OR (so van)) hanh vi ((cua triet) or (cua viet))~".
• Adding a wildcard symbol may retrieve word variants: thu sach y nang x hoi. hieu ve bac ((bo van) OR (so van)) hanh vi ((cua triet) or (cua viet))*.