Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dau thu co snippets" » "dau thau co snippets", "dau tu co snippets", "dat thu co snippets", "dau thuc co snippets", "dau thu 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: (((("dau 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: (((("dau thu co snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dau thu co snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dau thu co snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.