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