Perhaps you should try some spelling variations:
ve triet » va trien
nhan luc » nang luc
su triet » su viet, su tien
van hanh » van thanh, ban hanh, van anh
luc van » luoc van, luu van, duc van
tu sach » thu sach, su sach, tu cach
hieu vu » hieu va, hieu ve, hieu su
nang xa » nang x, lang xa, nang ma
te sach » toc sach
vu nhan » cu nhan, vu ngan, tu nhan
y nang » ky nang, ly nang, v nang

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)) y nang xa hoi. hieu vu nhan luc van hanh vi ((su triet) OR (ve triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) y nang xa hoi. hieu vu nhan luc van hanh vi ((su triet) OR (ve triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (te sach)) y nang xa hoi. hieu vu nhan luc van hanh vi ((su triet) OR (ve triet))".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) y nang xa hoi. hieu vu nhan luc van hanh vi ((su triet) OR (ve triet))*.