Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
nhan duc » nhan duoc, nhan luc, phan duc
ban hanh » ban hang
va triet » va trien, ve triet, cua triet
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va nhan » van nhan, ca nhan, va phan
duc ban » duc tan, duc van, dua ban
su viet » so viet

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

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