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