Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
nhan mac » han mac, nhan ma, nganh mac
ve triet » va trien
va triet » va thiet, va trien, cua triet
van hanh » van thanh, ban hanh, van anh
su triet » su viet, su tien
va nhan » van nhan, ca nhan, va phan
hieu va » lieu va, hieu qua
sach ty » sach y, sach tu, sach thu
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
mac van » cac van, ma van, mai van

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 mac van hanh vi ((((va triet) 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 mac van hanh vi ((((va triet) OR (ve triet))) OR (su triet)).
• Adding a wildcard symbol may retrieve word variants: thu sach ty nang xa hoi. hieu va nhan mac van hanh vi ((((va triet) or (ve triet))) or (su triet))*.