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