Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khu dun do snippets" » "khu du do snippets", "kha dung do snippets", "khu doan do snippets", "khu dung do snippets", "khu den do snippets", "khu dung doi 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 dun do 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 dun do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khu dun do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khu dun do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.