Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh van » thanh san, thanh toan, thanh phan
cua triet » cua viet, su triet, va triet
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
ky tang » ky nang, ky dang, kho tang
tang xa » trang xa, tang ma, lang xa
van cam » van lam, van cau, van dam
luc ban » duc ban, cuc ban, luc bat
cua tre » cua te, cuu tre, dua tren

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: vu sach ky tang xa hoi. hieu ((van cam) OR (van nam)) luc ban thanh van ((cua tre) OR (cua triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ky tang xa hoi. hieu ((van cam) or (van nam)) luc ban thanh van ((cua tre) OR (cua triet))~".
• Adding a wildcard symbol may retrieve word variants: vu sach ky tang xa hoi. hieu ((van cam) or (van nam)) luc ban thanh van ((cua tre) OR (cua triet))*.