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