Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
nhan luc » nang luc
ban hang » ngan hang
sach ky » sac ky, sach y, sach ty
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
va nhan » van nhan, ca nhan, va phan
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 ky lang xa hoi. lieu va nhan luc ((ban hanh) OR (ban hang)) vi ((va thiet) or (su viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky lang xa hoi. lieu va nhan luc ((ban hanh) OR (ban hang)) vi ((va thiet) OR (su viet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky lang xa hoi. lieu va nhan luc ((ban hanh) OR (ban hang)) vi ((va thiet) or (su viet))".
• Adding a wildcard symbol may retrieve word variants: thu sach ky lang xa hoi. lieu va nhan luc ((ban hanh) OR (ban hang)) vi ((va thiet) or (su viet))*.