Perhaps you should try some spelling variations:
cua triet » su triet, va triet
cua viet » ca viet, hoa viet, cua vat
hanh tai » thanh tai, hang tai, han tai
phan dau » phan tu, hang dau
van dau » van dao
va hanh » van hanh, va thanh, va danh
tu sach » thu sach, su sach, te sach
y nang » ky nang, ly nang, v nang
xuc va » duc va, tuc va, luc va
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 ((van dau) OR (phan dau)) xuc va hanh tai ((cua triet) OR (cua viet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang x hoi. hieu ((van dau) OR (phan dau)) xuc va hanh tai ((cua triet) or (cua viet))~".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang x hoi. hieu ((van dau) OR (phan dau)) xuc va hanh tai ((cua triet) or (cua viet))*.