Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cong vang ve snippets" » "cong lang ve snippets", "cong quang ve snippets", "cong ngang ve snippets", "cong vang de snippets", "cong dang ve snippets", "cong hang ve 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: (((("cong vang ve snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cong vang ve snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong vang ve snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong vang ve snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.