Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc toan chi snippets" » "duc tan chi snippets", "duc ton chi snippets", "duc hoan chi snippets", "duc toan cao snippets", "duc tai chi snippets", "duc luan chi 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: (((("duc toan chi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("duc toan chi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc toan chi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc toan chi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.