Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dung cua a1 slippers" » "dung luan a1 slippers", "dung cho a1 slippers", "dung cua am slippers", "dung cua a1 slippery", "dung cua a1 grippers"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("dung cua a1 slippers") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung cua a1 slippers") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung cua a1 slippers ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung cua a1 slippers") or ("python using java snippets"))) or ("locating bug code snippets"))*.