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