Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phap luu du snippets" » "phap lua du snippets", "phap luat du snippets", "phap luan du snippets", "phap luu duc snippets", "phap cuu du snippets", "phap huu 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: (((("phap luu 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: (((("phap luu du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phap luu du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phap luu du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.