Perhaps you should try some spelling variations:
nhan thuc » dan thuc, toan thuc
dinh lam » dinh van, tinh lao
nhan luc » nang luc
tu sach » thu sach, su sach, te sach
hanh va » hang va
sach ty » sach y, sach tu, sach thu
cu tren » tu tren, dua tren
hieu ve » hieu va, hieu van
lam hoi » lam thoi, nam hoi, lai hoi
ty dinh » my dinh, quy dinh, tai dinh

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 ty dinh lam hoi. hieu ve ((nhan thuc) OR (nhan luc)) va ((hanh va) or (hanh vi)) cu tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty dinh lam hoi. hieu ve ((nhan thuc) OR (nhan luc)) va ((hanh va) OR (hanh vi)) cu tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty dinh lam hoi. hieu ve ((nhan thuc) OR (nhan luc)) va ((hanh va) or (hanh vi)) cu tren".
• Adding a wildcard symbol may retrieve word variants: tu sach ty dinh lam hoi. hieu ve ((nhan thuc) OR (nhan luc)) va ((hanh va) or (hanh vi)) cu tren*.