Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc nhan can snippets" » "duc phan can snippets", "dac nhan can snippets", "luc nhan can snippets", "duc nhan chan snippets", "duc nhan dan snippets", "duc nhan 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 nhan 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 nhan can snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc nhan can snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc nhan can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.