Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dung hieu do snippets" » "dong hieu do snippets", "dung tieu do snippets", "trung hieu do snippets", "dung hieu so snippets", "dung hieu bo snippets", "dung bieu 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 hieu 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: (((("dung hieu do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung hieu do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung hieu do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.