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