Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phan lan hoc snippets" » "phan lap hoc snippets", "phan van hoc snippets", "phan loai hoc snippets", "phan luan hoc snippets", "phan dan 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: (((("phan lan 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: (((("phan lan hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phan lan hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phan lan hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.