Perhaps you should try some spelling variations:
nhan luc » nang luc
van hanh » van thanh, ban hanh, van anh
cua viet » ca viet, hoa viet, cua vat
tu sach » thu sach, su sach, te sach
hieu va » lieu va, hieu qua
va nhan » van nhan, ca nhan, va phan
luc van » luoc van, luu van, duc van
y nang » ky nang, ly nang, may nang
v nang » va nang, vu nang, van nang
vi cua » vai cua, di cua

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 ((y nang) or (v nang)) xa hoi. hieu va nhan luc van hanh vi cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((y nang) OR (v nang)) xa hoi. hieu va nhan luc van hanh vi cua viet.
• Adding a wildcard symbol may retrieve word variants: tu sach ((y nang) or (v nang)) xa hoi. hieu va nhan luc van hanh vi cua viet*.