Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dung dan lee snippets" » "dung dat lee snippets", "dung san lee snippets", "tung dan lee snippets", "dung han lee snippets", "dung tan lee snippets", "dung dan lieu 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 dan lee 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 dan lee snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung dan lee snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung dan lee snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.