Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khac duan le snippets" » "nhac dan le snippets", "khau luan le snippets", "khai tuan le snippets", "khac tuan le snippets", "khac quang le snippets", "khac luan len 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: (((("khac duan 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: (((("khac duan le snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khac duan le snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khac duan le snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.