Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phan ve hoc snippets" » "phan le hoc snippets", "phan va hoc snippets", "pha ve hoc snippets", "phan te hoc snippets", "phan vi 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 ve 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 ve hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phan ve hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phan ve hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.