Perhaps you should try some spelling variations:
qua nhan » cua nhan, qua nhat, qua phan
nhan luc » nang luc
ban hanh » ban hang
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
luc ban » duc ban, cuc ban, luc bat
vai cua » dai cua, lai cua, bai cua
hai cua » thai cua, dai cua, hoi cua
nang o » nang co, nang ho, nang ro
vi cua » di cua
o hoi » co hoi, o hoc, o hai

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky nang o hoi. hieu qua nhan luc ban hanh ((vi cua) or (((vai cua) OR (hai cua)))) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang o hoi. hieu qua nhan luc ban hanh ((vi cua) OR (((vai cua) OR (hai cua)))) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang o hoi. hieu qua nhan luc ban hanh ((vi cua) or (((vai cua) OR (hai cua)))) triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang o hoi. hieu qua nhan luc ban hanh ((vi cua) or (((vai cua) OR (hai cua)))) triet*.