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