Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dung tin he snippets" » "dong tin he snippets", "luong tin he snippets", "dung tren he snippets", "dung tinh he snippets", "dung tin ha snippets", "dung tin hieu 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: (((("dung tin he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung tin he snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung tin he snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung tin he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.