Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cong duy hoc snippets" » "cong quy hoc snippets", "cong duc hoc snippets", "cong dung hoc snippets", "cong du hoc snippets", "cong day hoc 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 duy hoc 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 duy hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong duy hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong duy hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.