Perhaps you should try some spelling variations:
nang xa » nang x, lang xa, nang ma
cac tuc » cac toc, cac tu, cac nuoc
cac tac » cac toc, cac bac, cac dac
cuu tre » cua tre, cau tren, cau treo
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
xa don » xa dong, la don, ba don
vi cuu » vi luu, vinh cuu

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) OR (cac tac)) xa don vi cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky nang xa hoi. hieu qua ((cac tuc) OR (cac tac)) xa don vi cuu tre".
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang xa hoi. hieu qua ((cac tuc) OR (cac tac)) xa don vi cuu tre*.