Perhaps you should try some spelling variations:
nhan luc » nang luc
va thanh » gia thanh, ban thanh, va tinh
va nhan » van nhan, ca nhan, va phan
hieu va » lieu va, hieu qua
su sach » so sach, vu sach
cao hoc » co hoc, cho hoc, chat hoc
so sanh » do sanh
luc va » duc va, tuc va, loc va
vi cu » vi su, vi xu
vi du » vi dum, va du, ve du

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) or (so sanh)) ky nang cao hoc. hieu va nhan luc va thanh ((vi cu) OR (vi du)) tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sanh)) ky nang cao hoc. hieu va nhan luc va thanh ((vi cu) OR (vi du)) tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (so sanh)) ky nang cao hoc. hieu va nhan luc va thanh ((vi cu) OR (vi du)) tren".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sanh)) ky nang cao hoc. hieu va nhan luc va thanh ((vi cu) OR (vi du)) tren*.