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