Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
ban thanh » ban hanh, ban hang
hoc sach » hoc sinh, hoc cac, hoc anh
va triet » va thiet, va trien, ve triet
mai hoi » mai khoi, dai hoi, lai hoi
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
cam duc » cam xuc, cao duc, pham duc
duc ban » duc tan, duc van, dua ban
ky dang » ky nang, ky danh
ma hoi » xa hoi, me hoi, va hoi
ve cam » ve cham, ve cac, va cam
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 ((((ma hoi) OR (mai hoi))) or (ma hoa)). hieu ve cam duc ban thanh vai va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach ky dang ((((ma hoi) OR (mai hoi))) OR (ma hoa)). hieu ve cam duc ban thanh vai va triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sach ky dang ((((ma hoi) OR (mai hoi))) or (ma hoa)). hieu ve cam duc ban thanh vai va triet*".