Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc tin don snippets" » "duc tien don snippets", "duc tan don snippets", "duc ton don snippets", "duc tien dong snippets", "duc tin dung snippets", "duc tinh doi 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 tin 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 tin don snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc tin don snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc tin don snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.