Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc lieu cao snippets" » "duoc lieu cao snippets", "du lieu cao snippets", "duc hieu cao snippets", "duc lieu dao snippets", "duc lieu co snippets", "duc lieu bao 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 lieu cao 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 lieu cao snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc lieu cao snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc lieu cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.