Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van hoan dat slippers" » "van hoang dat slippers", "van hoa dat slippers", "van toan dat slippers", "van hon dat slippers", "van hoan dat slippery", "van hoan dat 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 hoan dat 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 hoan dat slippers") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van hoan dat slippers ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van hoan dat slippers") or ("python using java snippets"))) or ("locating bug code snippets"))*.