Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tan le doan snippets" » "tan le dan snippets", "tan ly doanh snippets", "tan le hoang snippets", "tang le doan snippets", "tuan le doan snippets", "tan lee doan 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 doan 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 doan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tan le doan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tan le doan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.