Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu hien » bieu hien, dieu hien, chieu chien
hien cac » thien cac, vien cac, hieu cac
dinh vai » dinh van, dinh vi, dinh va
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
vai cua » dai cua, hai cua, lai cua
bo va » bao va, so va, co va
do va » do van, so va

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang xa hoi. hieu hien cac ((bo va) OR (do va)) dinh vai cua triet~".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. hieu hien cac ((bo va) OR (do va)) dinh vai cua triet*.