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