Perhaps you should try some spelling variations:
"duong cong 2 snippets" » "dung cong 2 snippets", "luong cong 2 snippets", "duong trong 2 snippets", "duong cong 92 snippets", "duong cong _ snippets", "duong cong o snippets", "duong cong 2 slippers"
"python using java snippets" » "python using data snippets", "python using java slippers"
"locating bug code snippets" » "locating bug code slippers", "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: (((("duong cong 2 snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("duong cong 2 snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duong cong 2 snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duong cong 2 snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.