Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khanh nam da snippets" » "hanh nam da snippets", "thanh nam da snippets", "nhanh nam da snippets", "khanh nam dan snippets", "khanh nam a snippets", "khanh nam va 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: (((("khanh nam da snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khanh nam da snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khanh nam da snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khanh nam da snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.