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