Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
va triet » va thiet, va trien, ve triet
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va nhan » van nhan, ca nhan, va phan
luc van » luoc van, luu van, duc van
cac ban » cac dan, cac van, can ban
su viet » so viet
y nang » ky nang, ly nang, v nang

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