Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khu nhan co snippets" » "khu nha co snippets", "thu nhan co snippets", "khi nhan co snippets", "khu nhan con snippets", "khu phan co snippets", "khu nhan mo 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 nhan co 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 nhan co snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khu nhan co snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khu nhan co snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.