Perhaps you should try some spelling variations:
hieu ve » hieu va, hieu van
cam tuc » cam xuc, nam thuc, dam thuc
xa hanh » xa thanh, xa khanh, va hanh
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
cam tu » cam thu, nam tu, dam tu

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 ky nang x ho. hieu ve ((cam tuc) OR (cam tu)) xa hanh vi ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky nang x ho. hieu ve ((cam tuc) OR (cam tu)) xa hanh vi ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky nang x ho. hieu ve ((cam tuc) OR (cam tu)) xa hanh vi ((cua tre) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: te sac ky nang x ho. hieu ve ((cam tuc) OR (cam tu)) xa hanh vi ((cua tre) or (cuu tre))*.