Perhaps you should try some spelling variations:
cua triet » su triet, va triet
thanh ve » hanh ve, thanh va, thanh vien
cua viet » ca viet, hoa viet, cua vat
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
tuc va » thuc va, truc va, tuc xa

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