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