Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
nhan duc » nhan duoc, nhan luc, phan duc
va triet » va thiet, va trien, ve triet
ban hang » ngan hang
hang di » hang doi, hang vi, hang dien
duc ban » duc tan, duc van, dua ban
va nhan » van nhan, ca nhan, va phan
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
su sach » so sach, vu sach
su viet » so viet

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