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