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