Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
thien van » thi van
cua triet » cua viet, su triet, va triet
hieu van » hieu va, lieu va, hieu ve
va thanh » gia thanh, ban thanh, va tinh
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
cau luc » cau truc, cau phuc
cua tre » cua te, cuu tre, dua tren
luc va » duc va, tuc va, loc va

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 ky nang x ho. ((hieu van) OR (thien van)) cau luc va thanh vai ((cua tre) OR (cua triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang x ho. ((hieu van) OR (thien van)) cau luc va thanh vai ((cua tre) or (cua triet))~".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang x ho. ((hieu van) OR (thien van)) cau luc va thanh vai ((cua tre) or (cua triet))*.