Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"len xu cao snippets" » "lenh xu cao snippets", "wen xu cao snippets", "len cu cao snippets", "len vu cao snippets", "len su cao 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: (((("len xu cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("len xu cao snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( len xu cao snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("len xu cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.