Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"vinh van can snippets" » "dinh van can snippets", "trinh van can snippets", "sinh vat can snippets", "vinh van canh snippets", "vinh van ban snippets", "vinh ban can 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 can 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 can snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( vinh van can snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("vinh van can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.