Perhaps you should try some spelling variations:
nhan thuc » nhan luc, dan thuc, toan thuc
hieu van » hieu va, thien van, lieu va
van nhan » van phan, van thanh, danh nhan
vat hanh » vat thanh, van hanh, va hanh
tu cach » tu cac
hoc cac » hoc cao
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (hoc cac)) ky lang xa hoi. hieu van nhan thuc vat hanh vi ((cua tre) OR (cuu tre))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu cach) or (hoc cac)) ky lang xa hoi. hieu van nhan thuc vat hanh vi ((cua tre) OR (cuu tre))~".
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (hoc cac)) ky lang xa hoi. hieu van nhan thuc vat hanh vi ((cua tre) OR (cuu tre))*.