Perhaps you should try some spelling variations:
thien van » thi van
hieu van » lieu va, hieu ve
dinh dat » dinh ket, dinh van, dinh lam
su triet » su viet, su tien, ve triet
tu sach » thu sach, su sach, te sach
hieu va » lieu va, hieu qua
thuc va » thuc vat, thuc dan, thuc day
va dinh » van dinh, va kinh, va tinh
y nang » ky nang, ly nang, v nang
dat su » sat su
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: tu sach y nang x hoi. ((hieu va) OR (((hieu van) OR (thien van)))) am thuc va dinh dat su triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang x hoi. ((hieu va) or (((hieu van) OR (thien van)))) am thuc va dinh dat su triet~".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang x hoi. ((hieu va) or (((hieu van) OR (thien van)))) am thuc va dinh dat su triet*.