Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
nhan duc » nhan duoc, nhan luc, phan duc
ban hang » ngan hang
va triet » va thiet, va trien, ve triet
su triet » su viet, ve 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
hang vi » hang va, hanh vi, hang di
su tien » su kien, su hien, tu tieng

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 hang vi ((va triet) or (((su triet) OR (su tien))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang xa hoi. hieu va nhan duc ban hang vi ((va triet) OR (((su triet) OR (su tien))))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky nang xa hoi. hieu va nhan duc ban hang vi ((va triet) or (((su triet) OR (su tien))))*".