Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nghe thi cua snippets" » "nghe thu cua snippets", "nghiem thi cua snippets", "nghe thuc cua snippets", "nghe thai cua snippets", "nghe thi cuc snippets", "nghe tri cua 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 cua 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 cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nghe thi cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nghe thi cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.