Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thuy do long snippets" » "thuyet do long snippets", "thay doi long snippets", "thuat do long snippets", "thuy do luong snippets", "thuy do hong snippets", "thuy do cong 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: (((("thuy do long snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("thuy do long snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thuy do long snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thuy do long snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.