Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
nhan cac » nhan cach, phan cac, nhan mac
va trien » va truyen, va thiet, va tuyen
ban hanh » ban hang
su triet » su viet, su tien
hieu va » lieu va, hieu qua
va nhan » van nhan, ca nhan, va phan
cac ban » cac dan, cac van, can ban
sach ty » sach y, sach tu, sach thu
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang

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 ty nang xa hoi. hieu va nhan cac ban hanh vi ((((va trien) or (ve triet))) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ty nang xa hoi. hieu va nhan cac ban hanh vi ((((va trien) OR (ve triet))) OR (su triet)).
• Adding a wildcard symbol may retrieve word variants: thu sach ty nang xa hoi. hieu va nhan cac ban hanh vi ((((va trien) or (ve triet))) or (su triet))*.