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