Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dung tra n1 slippers" » "dung tri n1 slippers", "dung tru n1 slippers", "dung tren n1 slippers", "dung tra n1 slippery", "dung tra n1 grippers"
"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 tra n1 slippers") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung tra n1 slippers") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung tra n1 slippers ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung tra n1 slippers") or ("python using java snippets"))) or ("locating bug code snippets"))*.