Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"dong danh du snippets" » "dong danh code snippets", "dong doanh du snippets", "dong anh du snippets", "cong danh du snippets", "dong danh dau snippets", "dong danh tu snippets", "dong 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: (((("dong 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: (((("dong danh du snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( dong danh du snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong danh du snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.