Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van hoe co snippets" » "van hoa co snippets", "van hoc co snippets", "van hieu co snippets", "van he co snippets", "van khoe cho snippets", "van khoe con snippets"
"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 hoe co snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("van hoe co snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van hoe co snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van hoe co snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.