Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cong han du snippets" » "cong hoan du snippets", "cong nhan du snippets", "cong khan du snippets", "cong han dau snippets", "cong van du snippets", "cong han tu 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 han du 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 han du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong han du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong han du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.