Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nhieu cau de snippets" » "nghiep cau de snippets", "nhu cau de snippets", "hieu cac de snippets", "nhieu cau den snippets", "nhieu cau do snippets", "nhieu cuu de 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: (((("nhieu cau 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: (((("nhieu cau de snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nhieu cau de snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nhieu cau de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.