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