Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"luc thu hoan snippets" » "luc thi hoan snippets", "luc thu hoach snippets", "luc thu ha snippets", "luc tu hoan snippets", "cuc thue hoan 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: (((("luc thu hoan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("luc thu hoan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( luc thu hoan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("luc thu hoan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.