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