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