Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc hai don snippets" » "cuc hai don snippets", "duc dai don snippets", "duc hau don snippets", "duc hai con snippets", "duc hai dan snippets", "duc hai son 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 hai don 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 hai don snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc hai don snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc hai don snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.