Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
van hanh » van thanh, ban hanh, van ban
nhan luc » nang luc
hieu van » hieu va, thien van, lieu va
van nhan » van phan, van thanh, danh nhan
van anh » van thanh, tuan anh, van minh
te sach » toc sach
v nang » va nang, vu nang, van nang
y nang » ky nang, ly nang, may nang
vi va » vi van, vai va, vu va

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ((y nang) or (v nang)) xa hoi. hieu van nhan luc ((van hanh) or (van anh)) vi va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((y nang) OR (v nang)) xa hoi. hieu van nhan luc ((van hanh) OR (van anh)) vi va triet.
• Adding a wildcard symbol may retrieve word variants: te sach ((y nang) or (v nang)) xa hoi. hieu van nhan luc ((van hanh) or (van anh)) vi va triet*.