Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hoi dan le snippets" » "hoa dan le snippets", "hoc dan le snippets", "hoi dap le snippets", "hoi ban le snippets", "hoi van le snippets", "hoi dan ve 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: (((("hoi dan le snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hoi dan le snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hoi dan le snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hoi dan le snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.