Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"voi voi cong snippets" » "voi noi cong snippets", "voi moi cong snippets", "voi tai cong snippets", "doi voi cong snippets", "voi doi cong snippets", "moi voi cong 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: (((("voi voi cong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("voi voi cong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( voi voi cong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("voi voi cong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.