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, hai cua, lai cua
co hai » co dai, co hoi, so hai
vi cua » di cua
o hai » so hai, o lai, _ 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 hai) or (co hai)). hieu qua nhan luc ban hanh ((vi cua) or (vai cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang ((o hai) OR (co hai)). hieu qua nhan luc ban hanh ((vi cua) OR (vai cua)) triet.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang ((o hai) or (co hai)). hieu qua nhan luc ban hanh ((vi cua) or (vai cua)) triet*.