Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"vot con toan snippets" » "vot cong toan snippets", "vot mon toan snippets", "vot con than snippets", "mot con toan snippets", "vat con toan snippets", "vit con toan 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: (((("python using java snippets") or ("vot con toan snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("python using java snippets") OR ("vot con toan snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( python using java snippets ) or ( vot con toan snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("python using java snippets") or ("vot con toan snippets"))) or ("locating bug code snippets"))*.