I always use SAP xSearch to search OSS notes, SCN discussions, SCN wikis, SCN blogs. In that screen, I can get all in one. It is not working since last week.
Here is the link of SAP xsearch https://websmp130.sap-ag.de/sap/support/xsearch/default.do
Or another way, from new search screen, you can click for xSearch as below:
After click on the above link or Go in that screen, system is asking for S user ID and password, but after giving the same it is getting back into the previous screen and asking for S user ID and password again.