Perhaps you should try some spelling variations:
"dung chung chou snippets" » "dung chung code snippets", "dung cong chou snippets", "dung trung chou snippets", "truong chung chou snippets", "dung chung cho snippets", "dung chung cu snippets", "dung chung hoc snippets"
"locating bug core snippets" » "locating bug code snippets"
"dung java java snippets" » "dung 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 chou snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung chung chou snippets") OR ("dung java java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( dung chung chou snippets ) or ( dung java java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung chung chou snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))*.