Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"rat nhieu de snippets" » "dat hieu de snippets", "rat hieu ve snippets", "rat nhiet do snippets", "rat chieu ke 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: (((("rat nhieu de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("rat nhieu de snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( rat nhieu de snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("rat nhieu de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.