Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"den nhay dot snippets" » "den nay dot snippets", "den ngay dot snippets", "dien nhat dot snippets", "den nhan dot snippets", "den nhay vot snippets", "den thay 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: (((("den nhay dot snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("den nhay dot snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( den nhay dot snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("den nhay dot snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.