Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"viet ca moi snippets" » "viet ha moi snippets", "viet co moi snippets", "viet a moi snippets", "viet cua moi snippets", "viet cac moi snippets", "viet can moi 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: (((("viet ca moi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("viet ca moi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( viet ca moi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("viet ca moi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.