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