Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"ban cong da snippets" » "bang cong da snippets", "van cong da snippets", "phan cong da snippets", "ban cong dan snippets", "ban cong dac snippets", "ban 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: (((("ban 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: (((("ban cong da snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ban cong da snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ban cong da snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.