Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khoi dai son snippets" » "thoi dai son snippets", "khi dai son snippets", "hoi dai son snippets", "khoi dai so snippets", "khoi doi song snippets", "khoi thai son 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: (((("khoi dai son snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khoi dai son snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khoi dai son snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khoi dai son snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.