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