Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"luan van cop snippets" » "luan van co snippets", "luan van cong snippets", "luan van choi snippets", "quan van cop snippets", "lan van cop 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: (((("luan van cop snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("luan van cop snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( luan van cop snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("luan van cop snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.