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