Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"len nghe cao snippets" » "luyen nghe cao snippets", "lang nghe cao snippets", "benh nghe cao snippets", "len nghe co snippets", "len nghe nano snippets", "len nghe chan 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 nghe 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 nghe cao snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( len nghe cao snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("len nghe cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.