Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nhan dau do snippets" » "phan dau do snippets", "nhan dan do snippets", "han dau do snippets", "nhan cau do snippets", "nhan dau co snippets", "nhan dao do 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: (((("nhan dau 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: (((("nhan dau do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nhan dau do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nhan dau do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.