Perhaps you should try some spelling variations:
cuu tre » cau tren, cau treo
cau luc » cau truc, cau phuc
cua tre » cua te, cua triet, dua tren
te sach » toc sach
hieu ke » hieu kem, chieu ke, hieu ky
va hanh » van hanh, va thanh, va danh
te sac » te cac, te san
ke cau » ket cau
luc va » duc va, tuc va, loc va
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 sac) OR (te sach)) ky nang x hoi. hieu ke cau luc va hanh vi ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sac) OR (te sach)) ky nang x hoi. hieu ke cau luc va hanh vi ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sac) OR (te sach)) ky nang x hoi. hieu ke cau luc va hanh vi ((cua tre) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: ((te sac) OR (te sach)) ky nang x hoi. hieu ke cau luc va hanh vi ((cua tre) or (cuu tre))*.