Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khu doan dep snippets" » "kieu doan dep snippets", "khu do dep snippets", "thi doan dep snippets", "khu don dep snippets", "khu doan dieu snippets", "khu doan dien 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: (((("khu doan dep snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khu doan dep snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khu doan dep snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khu doan dep snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.