Perhaps you should try some spelling variations:
nham thuc » nhan thuc, nam thuc, nham thu
cua triet » cua viet, su triet, va triet
doc sach » hoc sach, toc sach, nuoc sach
hieu van » hieu va, thien van, lieu va
van nham » van nam, van nhan, van tham
thuc day » thuc dan, thuc vat
day hanh » day nhanh, day thanh, dao hanh
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
vi cua » vai cua, di cua

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: ((su sach) OR (doc sach)) ky nang xa hoi. hieu van nham thuc day hanh vi cua triet~.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (doc sach)) ky nang xa hoi. hieu van nham thuc day hanh vi cua triet*.