Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
tu sach » thu sach, su sach, te sach
nang co » nang cao, nang doc, nang noi
hieu ve » hieu va, hieu van
cac toc » cac nuoc, cac thoi
cac toi » cac thoi
xa hanh » xa thanh, xa khanh, va hanh
y nang » ky nang, ly nang, v nang
co hoi » co hoc, co loi
vi su » va su, ve su, ki su

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 y nang co hoi. hieu ve ((cac toc) OR (cac toi)) xa hanh vi su triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang co hoi. hieu ve ((cac toc) OR (cac toi)) xa hanh vi su triet".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang co hoi. hieu ve ((cac toc) OR (cac toi)) xa hanh vi su triet*.