Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh vai » hanh vi, hanh va, hanh tai
cua tre » cua te, cuu tre, dua tren
va hanh » van hanh, va thanh, va danh
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
van cau » van hau, van chat, toan cau
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
van dau » van dao, phan dau
luc va » duc va, tuc va, loc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ty nang xa hoi. hieu ((van cau) OR (van dau)) luc va hanh vai ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang xa hoi. hieu ((van cau) OR (van dau)) luc va hanh vai ((cua tre) OR (cua triet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang xa hoi. hieu ((van cau) OR (van dau)) luc va hanh vai ((cua tre) or (cua triet))*".