Perhaps you should try some spelling variations:
"dung luong cong snippets" » "dung luong code snippets", "dung huong cong snippets", "dung uong cong snippets", "hung luong cong snippets", "dung dung cong snippets", "dung trong cong snippets", "dung cong cong snippets"
"locating bug core snippets" » "locating bug code snippets"
"hang java java snippets" » "hang va java 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: (((("dung luong cong snippets") or ("hang java java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung luong cong snippets") OR ("hang java java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( dung luong cong snippets ) or ( hang java java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung luong cong snippets") or ("hang java java snippets"))) or ("locating bug core snippets"))*.