Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc hung lan slippers" » "quoc hung lan slippers", "duc huong lan slippers", "duc nhung lan slippers", "duc hong lan slippers", "duc hung lan slippery", "duc hung lan 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: (((("duc hung lan slippers") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("duc hung lan slippers") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc hung lan slippers ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc hung lan slippers") or ("python using java snippets"))) or ("locating bug code snippets"))*.