Perhaps you should try some spelling variations:
phan luc » nhan luc, phan duc, phan suc
van hanh » van thanh, ban hanh, van anh
va trien » va truyen, va thiet, va tuyen
su triet » su viet, su tien, ve triet
nang xa » nang x, lang xa, nang ma
hieu va » hieu qua
luc van » luoc van, luu van, duc van
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky nang xa hoi. ((hieu va) or (lieu va)) phan luc van hanh vi ((va trien) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang xa hoi. ((hieu va) OR (lieu va)) phan luc van hanh vi ((va trien) OR (su triet)).
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang xa hoi. ((hieu va) or (lieu va)) phan luc van hanh vi ((va trien) or (su triet))*.