Perhaps you should try some spelling variations:
ban hanh » ban hang
hanh vai » hanh vi, hanh va, hanh tai
su triet » su viet, su tien, ve triet
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
tang ma » tang van
hieu ve » hieu va, hieu van
xuc ban » duc ban, cuc ban, quoc ban
ve cam » ve cham, ve cac, va cam
vai su » va su, van su, lai su

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky ((tang ma) or (mang may)) hoi. hieu ve cam xuc ban hanh vai su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky ((tang ma) OR (mang may)) hoi. hieu ve cam xuc ban hanh vai su triet.
• Adding a wildcard symbol may retrieve word variants: tu sach ky ((tang ma) or (mang may)) hoi. hieu ve cam xuc ban hanh vai su triet*.