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