Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cong lon duc slippers" » "cong luong duc slippers", "cong dong duc slippers", "cong cong duc slippers", "cong ton duc slippers", "cong lon suc slippers", "cong lon duc slippery", "cong lon duc 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 lon duc 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 lon duc slippers") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong lon duc slippers ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong lon duc slippers") or ("python using java snippets"))) or ("locating bug code snippets"))*.