Perhaps you should try some spelling variations:
dau triet » cau triet, dau tien, dau tren
thanh van » thanh san, thanh toan, thanh phan
su triet » su viet, su tien, ve triet
va thanh » gia thanh, ban thanh, va tinh
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
van cam » van lam, van cau, van dam
tang xa » trang xa, tang ma, lang xa
ky tang » ky nang, ky dang, kho tang
xuc va » duc va, tuc va, luc 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 tang xa hoi. hieu ((van cam) OR (van nam)) xuc va thanh van ((dau triet) OR (su triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky tang xa hoi. hieu ((van cam) OR (van nam)) xuc va thanh van ((dau triet) or (su triet))~".
• Adding a wildcard symbol may retrieve word variants: tu sach ky tang xa hoi. hieu ((van cam) OR (van nam)) xuc va thanh van ((dau triet) or (su triet))*.