Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van hop hoan snippets" » "van phap hoan snippets", "van hop khoa snippets", "van hoa hoan snippets", "van hoc hoan snippets", "van hoe hoan 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 hop hoan 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 hop hoan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van hop hoan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van hop hoan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.