Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"vinh van cac snippets" » "dinh van cac snippets", "trinh van cac snippets", "sinh vat cac snippets", "vinh van hac snippets", "vinh van cau snippets", "vinh van bac 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: (((("vinh van cac snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("vinh van cac snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( vinh van cac snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("vinh van cac snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.