Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"han bi cong snippets" » "han bo cong snippets", "han tai cong snippets", "han thi cong snippets", "nhan bi cong snippets", "phan bi cong snippets", "than bi cong 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: (((("han bi cong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("han bi cong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( han bi cong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("han bi cong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.