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