Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"viet cua can snippets" » "viec cua can snippets", "viet ca can snippets", "viet qua can snippets", "viet cua cac snippets", "viet cua ban snippets", "viet cua dan 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 cua can 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 cua can snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( viet cua can snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("viet cua can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.