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