Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"day thi cao snippets" » "dan thi cao snippets", "dao thi cao snippets", "dam thi cao snippets", "day thai cao snippets", "day thi hao snippets", "day thi bao 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: (((("day thi cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("day thi cao snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( day thi cao snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("day thi cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.