Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phi van doan snippets" » "phi van doanh snippets", "phi van toan snippets", "phi van hoan snippets", "phi san doan snippets", "thi van doan snippets", "phi va 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: (((("phi 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: (((("phi van doan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phi van doan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phi van doan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.