Perhaps you should try some spelling variations:
hieu cua » hieu qua, dieu cua, bieu cua
cua nhan » ca nhan, cua ngan, cua nha
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 hoi » co hoc, co loi
vi cua » di cua
o hoi » o hoc, o hai, o hoa

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) or (co hoi)). hieu cua 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 hoi) OR (co hoi)). hieu cua nhan luc ban hanh ((vi cua) OR (vai cua)) triet.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang ((o hoi) or (co hoi)). hieu cua nhan luc ban hanh ((vi cua) or (vai cua)) triet*.