after following some solutions from internet but nothing works out, I was aware that we had proxy and i place it on "outomatic configuration url" test proxy connection and say connected.
in android studio->tool->SDK Manager->Android SDK Location click edit and provide its location where all SDK tools i downloaded click next then nothing happen
I change my proxy from "outomatic configuration url" to Manual and provide username & password where username and password is the same as your login in windows then again repeat: studio->tool->SDK Manager->Android SDK Location, and it work
conclusion: SDK manager wasn't actually using yung download SDK instead download it anew so delete it before running SDK Manager similar to what @Khanh-Tran suggested