Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
hoc sach » hoc sinh, hoc cac, hoc anh
va triet » va thiet, va trien, ve triet
hieu ve » hieu va, hieu van
sach ky » sac ky, sach y, sach ty
luc ban » duc ban, luc bat, luc van
cuc ban » cua ban, cac ban, cuu ban
ky dang » ky nang, ky danh
ve cac » va cac, vien cac
vai va » mai va, dai va, hai va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sach ky dang ((xa hoi) or (ma hoa)). hieu ve cac ((luc ban) or (cuc ban)) thanh vai va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach ky dang ((xa hoi) OR (ma hoa)). hieu ve cac ((luc ban) OR (cuc ban)) thanh vai va triet.
• Adding a wildcard symbol may retrieve word variants: hoc sach ky dang ((xa hoi) or (ma hoa)). hieu ve cac ((luc ban) or (cuc ban)) thanh vai va triet*.