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