Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
hieu van » hieu va, thien van, lieu va
hanh vai » hanh vi, hanh tai, hanh van
su triet » su viet, su tien, ve triet
te sach » toc sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
van mac » van hac, van bac, van man
hanh va » hang va, hanh vi

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: te sach ky nang xa hoi. hieu van mac le van ((hanh vai) OR (hanh va)) ((cua triet) OR (su triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang xa hoi. hieu van mac le van ((hanh vai) or (hanh va)) ((cua triet) OR (su triet))~".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang xa hoi. hieu van mac le van ((hanh vai) or (hanh va)) ((cua triet) OR (su triet))*.