Perhaps you should try some spelling variations:
cau triet » cau trieu, su triet, cua triet
hanh tai » thanh tai, hang tai, han tai
hanh lai » hanh lam, thanh lap, thanh loi
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
van hac » van hoc, van hai, van chat
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
van ha » van hoa, van chat, van hanh

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 xa hoi. hieu ((van hac) OR (van ha)) duc va ((hanh lai) OR (hanh tai)) cau triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang xa hoi. hieu ((van hac) OR (van ha)) duc va ((hanh lai) or (hanh tai)) cau triet~".
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang xa hoi. hieu ((van hac) OR (van ha)) duc va ((hanh lai) or (hanh tai)) cau triet*.