Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc dung can snippets" » "duc hung can snippets", "duc cuong can snippets", "duc phung can snippets", "duc dung cac snippets", "duc dung san snippets", "duc dung van 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: (((("duc dung can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("duc dung can snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc dung can snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc dung can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.