Perhaps you should try some spelling variations:
nang xa » nang x, lang xa, nang ma
cao tuc » dao tuc, cao suc, cao toc
cao duc » dao duc, cao suc, giao duc
va dinh » van dinh, va kinh, vu dinh
va tinh » may tinh
hai cua » thai cua, dai cua, hoi cua
cua tre » cua te, cuu tre, cua triet
tu cam » tu cham, tu cac, tu nam
cam ky » cao ky, cac ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu cam ky nang xa hoi. hieu qua ((cao tuc) OR (cao duc)) ((va dinh) or (va tinh)) hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cam ky nang xa hoi. hieu qua ((cao tuc) OR (cao duc)) ((va dinh) OR (va tinh)) hai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cam ky nang xa hoi. hieu qua ((cao tuc) OR (cao duc)) ((va dinh) or (va tinh)) hai cua tre".
• Adding a wildcard symbol may retrieve word variants: tu cam ky nang xa hoi. hieu qua ((cao tuc) OR (cao duc)) ((va dinh) or (va tinh)) hai cua tre*.