Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nhat cong da snippets" » "nhap cong da snippets", "chat cong da snippets", "thuat cong da snippets", "nhat cong dan snippets", "nhat cong dac snippets", "nhat cong dau 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: (((("nhat cong da snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nhat cong da snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nhat cong da snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nhat cong da snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.