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