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