Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nghe thi can snippets" » "nghe thu can snippets", "nghiem thi can snippets", "nghe thuc can snippets", "nghe thi canh snippets", "nghe thi lan snippets", "nghe thi dan snippets"
"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: (((("nghe thi can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nghe thi can snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nghe thi can snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nghe thi can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.