Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"len tan doan snippets" » "len tran doan snippets", "len tap doan snippets", "len van doan snippets", "le tan doan snippets", "len tac doan snippets", "sen tan doan 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: (((("len tan doan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("len tan doan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( len tan doan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("len tan doan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.