Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
hieu ve » hieu va, hieu van
duc ban » dua ban, duc man, duc manh
duc van » duc va, duc manh, duc phan
ve cac » va cac, vien cac
x hoi » xa hoi, o hoi, x ho
vi va » vi van, vai va, vu va

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ty nang x hoi. hieu ve cac ((duc ban) or (((duc van) or (duc tan)))) hanh vi va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty nang x hoi. hieu ve cac ((duc ban) OR (((duc van) OR (duc tan)))) hanh vi va triet.
• Adding a wildcard symbol may retrieve word variants: su sach ty nang x hoi. hieu ve cac ((duc ban) or (((duc van) or (duc tan)))) hanh vi va triet*.