Perhaps you should try some spelling variations:
cau treo » cau theo, cau tren, cau triet
nang xa » nang x, lang xa, nang ma
qua cac » cua cac
cac tuc » cac toc, cac tu, cac tac
cua tre » cua te, cuu tre, cua triet
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
xa don » xa dong, la don, ba don

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky nang xa hoi. hieu qua cac tuc xa don vi ((cau treo) OR (cua tre))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky nang xa hoi. hieu qua cac tuc xa don vi ((cau treo) OR (cua tre))".
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang xa hoi. hieu qua cac tuc xa don vi ((cau treo) OR (cua tre))*.