Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dung dau doi snippets" » "dung dat doi snippets", "dung dan doi snippets", "dung du doi snippets", "dung cau doi snippets", "dung dau noi snippets", "dung dau 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: (((("dung dau doi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung dau doi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung dau doi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung dau doi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.