Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
van hanh » van thanh, ban hanh, van anh
nhan luc » nang luc
luc van » luoc van, luu van, duc van
va nhan » van nhan, ca nhan, va phan
hieu va » lieu va, hieu qua
tu sach » thu sach, su sach, tu cach
te sach » toc sach
x hoi » xa hoi, x ho, 5 hoi
vi va » vi van, vai va, vu va
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) or (te sach)) ky nang ((x hoi) or (o hoi)). hieu va nhan luc van hanh vi va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ky nang ((x hoi) OR (o hoi)). hieu va nhan luc van hanh vi va triet.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) ky nang ((x hoi) or (o hoi)). hieu va nhan luc van hanh vi va triet*.