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