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

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 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 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 va ((hanh va) or (hanh vi)) cu tren*.