Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cong thi dan slippers" » "cong thai dan slippers", "cong khi dan slippers", "dong thi dan slippers", "cong thi doan slippers", "cong thi lan slippers", "cong thi dai slippers", "cong thi dan slippery", "cong thi 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: (((("cong thi 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: (((("cong thi dan slippers") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong thi dan slippers ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong thi dan slippers") or ("python using java snippets"))) or ("locating bug code snippets"))*.