Hi All,
We all know Google as a Search Engine and how it does job effectively. But many of us doesn't know how to do it very precisely.
Here are few tips which are helpful
- If you are looking for an exact Phrase use quotation marks like "Condition Update" which will narrow the result.
- Expand Search with synonym Use "Tilde" Eg: "~SAP" lists out all the URL where SAP is present.
- If you are looking for a downloadable files like PDF's DocX, ppt, etc Eg: "condition update sap" filetype:pdf
Apart from above here is a customized link which search the entire SAP Wiki and SDN websites
https://www.google.com/cse/home?cx=013447253335410278659:k8ob9ipscwg
Credits to the creator of the link
Happy Google 
Thanks,
Sriram.