Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu vien » hieu viec, thieu nien, hieu tieng
hieu hien » bieu hien, dieu hien, chieu chien
hanh vai » hanh vi, hanh va, hanh tai
sach ty » sach y, sach tu, sach thu
thu van » thuc van, thuy van, chu van
ty nang » ky nang, ty xang, ty hang
vai cua » dai cua, hai cua, lai cua
tu sach » thu sach, su sach, te sach
tu van » tu 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 ty nang x hoi. ((hieu vien) OR (hieu hien)) cac ((thu van) OR (tu van)) hanh vai cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang x hoi. ((hieu vien) or (hieu hien)) cac ((thu van) OR (tu van)) hanh vai cua triet~".
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang x hoi. ((hieu vien) or (hieu hien)) cac ((thu van) OR (tu van)) hanh vai cua triet*.