Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"lan dau cao snippets" » "van dau cao snippets", "ban dau cao snippets", "han dau cao snippets", "lan dau co snippets", "lan dau cay snippets", "lan dam cao 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: (((("lan dau 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: (((("lan dau cao snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( lan dau cao snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("lan dau cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.