Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nao tu cong snippets" » "nao thu cong snippets", "nao te cong snippets", "nao tai cong snippets", "tao tu cong snippets", "lao tu cong snippets", "cao tu 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: (((("nao tu 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: (((("nao tu cong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nao tu cong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nao tu cong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.