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