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