Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"doc cao do snippets" » "hoc cao do snippets", "do cao do snippets", "doc dao do snippets", "doc cao dao snippets", "doc cau do snippets", "doc 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: (((("doc 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: (((("doc cao do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doc cao do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doc cao do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.