Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phi vat hon snippets" » "phi va hon snippets", "phi van hon snippets", "phap vat hon snippets", "phi vat hoc snippets", "phi vat con snippets", "phi vat khong 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 vat hon 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 vat hon snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phi vat hon snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phi vat hon snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.