Perhaps you should try some spelling variations:
"dung chung cong snippets" » "dung chung code snippets", "dung cong cong snippets", "dung trung cong snippets", "truong chung cong snippets", "dung nhung cong snippets", "dung chong cong snippets", "dung phung 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 chung 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 chung cong snippets") OR ("hang java java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( dung chung cong snippets ) or ( hang java java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung chung cong snippets") or ("hang java java snippets"))) or ("locating bug core snippets"))*.