Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
va triet » va thiet, va trien, ve triet
ban hang » ngan hang
nhan luc » nang luc
su triet » su viet, su tien, ve triet
thi hang » thi hanh, thi nang, thi hong
hieu va » lieu va, hieu qua
luc ban » duc ban, cuc ban, luc bat
hang di » hang doi, hang vi, hang dien
ty nang » ky nang, ty xang, ty hang
va nhan » van nhan, ca nhan, va phan

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