Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dung may mot snippets" » "dung va mot snippets", "dung tai mot snippets", "mang may mot snippets", "dung may moc snippets", "dung tay mot 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 may mot 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 may mot snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung may mot snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung may mot snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.