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