Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"doi lanh co snippets" » "doi hanh co snippets", "doi anh co snippets", "doi canh co snippets", "doi lang co snippets", "doi danh co 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: (((("doi lanh co snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("doi lanh co snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doi lanh co snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doi lanh co snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.