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