Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"doan do hoi snippets" » "doan o hoi snippets", "toan do hoi snippets", "doanh dao hoi snippets", "doan do choi snippets", "doan do hoai snippets", "doan do thoi 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: (((("doan do hoi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("doan do hoi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doan do hoi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doan do hoi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.