Perhaps you should try some spelling variations:
thien van » thi van
cua triet » cua viet, su triet, va triet
toc sach » hoc sach, doc sach, thuoc sach
hieu van » hieu va, lieu va, hieu ve
nang co » nang cao, nang doc, nang noi
cuc ban » cua ban, cuu ban, duc ban
cac ban » cac dan, cac van, can ban
y nang » ky nang, ly nang, v nang
co hoi » co hoc, co loi
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: toc sach y nang co hoi. ((hieu van) OR (thien van)) nam ((cuc ban) OR (cac ban)) hanh vi cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach y nang co hoi. ((hieu van) or (thien van)) nam ((cuc ban) OR (cac ban)) hanh vi cua triet~".
• Adding a wildcard symbol may retrieve word variants: toc sach y nang co hoi. ((hieu van) or (thien van)) nam ((cuc ban) OR (cac ban)) hanh vi cua triet*.