Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
su triet » su viet, su tien, ve triet
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
truc va » thuc vat, trung va
thuc va » thuc vat, thuc dan, thuc day
van tai » von tai, van tuan
y nang » ky nang, ly nang, v nang
va cau » van cau, va cac, va dau

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 sach y nang xa hoi. lieu va cau ((truc va) OR (thuc va)) van tai ((cua triet) OR (su triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang xa hoi. lieu va cau ((truc va) or (thuc va)) van tai ((cua triet) OR (su triet))~".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang xa hoi. lieu va cau ((truc va) or (thuc va)) van tai ((cua triet) OR (su triet))*.