Perhaps you should try some spelling variations:
"dang su cong snippets" » "dang su code snippets", "dang su cuong snippets", "dang sua cong snippets", "dang tu cong snippets", "dan su cong snippets", "dung su cong snippets", "dong su cong snippets"
"locating bug core snippets" » "locating bug code 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: (((("dang su cong snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dang su cong snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( dang su cong snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dang su cong snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.