Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
xuc ban » cuc ban, quoc ban, xuat ban
duc ban » duc tan, duc van, dua ban
banh vi » hanh vi, ban vi, benh vi
cua tre » cua te, cuu tre, dua tren
va cam » va cham, va cac, va cao
x hoi » xa hoi, o hoi, x ho

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 ky nang x hoi. hieu va cam ((xuc ban) OR (duc ban)) banh vi ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang x hoi. hieu va cam ((xuc ban) OR (duc ban)) banh vi ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang x hoi. hieu va cam ((xuc ban) OR (duc ban)) banh vi ((cua tre) or (cua triet))".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang x hoi. hieu va cam ((xuc ban) OR (duc ban)) banh vi ((cua tre) or (cua triet))*.