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