Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
ban hanh » ban hang
va triet » va trien, ve triet, cua triet
sach ky » sac ky, sach y, sach ty
va nang » van nang, da nang, cam nang
luc ban » duc ban, cuc ban, luc bat
su viet » so viet
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc sach ky nang x hoi. lieu va nang luc ban hanh vi ((((va triet) or (va thiet))) or (su viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach ky nang x hoi. lieu va nang luc ban hanh vi ((((va triet) OR (va thiet))) OR (su viet)).
• Adding a wildcard symbol may retrieve word variants: thuoc sach ky nang x hoi. lieu va nang luc ban hanh vi ((((va triet) or (va thiet))) or (su viet))*.