Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khi doi don snippets" » "khi dai don snippets", "khi hoi don snippets", "khi moi don snippets", "khi doi dan snippets", "khi doi doanh snippets", "khi doi duong 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: (((("khi doi don snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khi doi don snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khi doi don snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khi doi don snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.