Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thieu nhi do snippets" » "thieu nhi o snippets", "thieu nhiet do snippets", "thieu nghi don snippets", "hieu nhi 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: (((("thieu nhi 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: (((("thieu nhi do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thieu nhi do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thieu nhi do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.