Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
te sach » toc sach
hieu va » lieu va, hieu qua
loc van » luoc van, lo van, loc va
hoc van » hoc dan, hoc va, hoc vat
cuu tre » cua tre, cau tren, cau treo
y nang » ky nang, ly nang, v nang
va cam » va cham, va cac, va cao
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach y nang x hoi. hieu va cam ((loc van) OR (hoc van)) hanh vi ((cua triet) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang x hoi. hieu va cam ((loc van) OR (hoc van)) hanh vi ((cua triet) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang x hoi. hieu va cam ((loc van) OR (hoc van)) hanh vi ((cua triet) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: te sach y nang x hoi. hieu va cam ((loc van) OR (hoc van)) hanh vi ((cua triet) or (cuu tre))*.