Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tan le toan snippets" » "tan ke toan snippets", "tan le doan snippets", "tan le tuan snippets", "tang le toan snippets", "tuan le toan snippets", "tan lee toan 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: (((("tan le toan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tan le toan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tan le toan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tan le toan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.