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