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