Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hoc tan dan slippers" » "hoc dan dan slippers", "hoc tap dan slippers", "hoc tai dan slippers", "hoc tang dan slippers", "hoc tan doan slippers", "hoc ban dan slippers", "hoc tan dan slippery", "hoc tan dan grippers"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hoc tan dan slippers") OR ("python using java snippets"))) OR ("locating bug code snippets"))~.
• Removing quotes may allow a broader search: (((( hoc tan dan slippers ) or ( python using java snippets ))) or ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("hoc tan dan slippers") or ("python using java snippets"))) or ("locating bug code snippets"))*.