those two queries are not the same because in the first one, you didnt encode the "plus" in the url so the browser will understand it as a concatenation : %D9%8A%D9%88%D8%B3%D9%81%20 + %20%D9%85%D8%B5%D8%B1 مصر يوسف
in the second query, the "plus" is encoded to "%2B"
those two queries are not the same because in the first one, you didnt encode the "plus" in the url so the browser will understand it as a concatenation : %D9%8A% D9%88%D8% B3%D9%81% 20 + %20%D9% 85%D8%B5% D8%B1 مصر يوسف
in the second query, the "plus" is encoded to "%2B"
That's the right writing to search for "مصر + يوسف" , http:// www.alfanous. org/json? search= %D9%85% D8%B5%D8% B1%20%2B% 20%D9%8A% D9%88%D8% B3%D9%81
try always to encode the special characters in the url