Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"den cau noi snippets" » "den cac noi snippets", "den cam noi snippets", "diem cau noi snippets", "den cau hoi snippets", "den cau doi snippets", "den cach noi 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 cau noi 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 cau noi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( den cau noi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("den cau noi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.