Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dao noi so snippets" » "dau noi so snippets", "dao voi so snippets", "nao noi so snippets", "dao noi bo snippets", "dao noi co 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: (((("dao noi 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: (((("dao noi so snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dao noi so snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dao noi so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.