Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thuy do tong snippets" » "thuyet do tong snippets", "thay doi tong snippets", "thuat do tong snippets", "thuy dao tong snippets", "thuy do trong snippets", "thuy do hong 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 tong 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 tong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thuy do tong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thuy do tong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.