Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"do cho tre snippets" » "do cho thue snippets", "do khoe tre snippets", "do choi tre snippets", "dao cho tre snippets", "do cao tre 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: (((("do cho tre snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("do cho tre snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( do cho tre snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("do cho tre snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.