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