Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
thanh te » thanh ve, thanh de, thanh le
su triet » su viet, su tien, ve triet
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
qua cac » cua cac
xuc va » duc va, tuc va, xac va
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 ky nang x ho. hieu qua cac ((xuc va) or (luc va)) thanh te ((cua triet) OR (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang x ho. hieu qua cac ((xuc va) OR (luc va)) thanh te ((cua triet) OR (su triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang x ho. hieu qua cac ((xuc va) or (luc va)) thanh te ((cua triet) OR (su triet))".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang x ho. hieu qua cac ((xuc va) or (luc va)) thanh te ((cua triet) OR (su triet))*.