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