Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phi doi thu slippers" » "phi loi thu slippers", "phu doi thu slippers", "khi doi thu slippers", "phi doi thu slippery", "phi doi thu 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: (((("phi doi thu slippers") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("phi doi thu slippers") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phi doi thu slippers ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phi doi thu slippers") or ("python using java snippets"))) or ("locating bug code snippets"))*.