Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"luc son cau snippets" » "lac son cau snippets", "luc sang cau snippets", "quoc son cau snippets", "luc song cau snippets", "luc so cau snippets", "luc toan cau 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 son cau 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 son cau snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( luc son cau snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("luc son cau snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.