Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dung mao doi snippets" » "dung mo doi snippets", "dung may doi snippets", "dung bao doi snippets", "dung mai doi snippets", "dung meo doi snippets", "dung tao doi 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 mao 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 mao doi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung mao doi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung mao doi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.