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