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