Perhaps you should try some spelling variations:
"dong vat cach snippets" » "dong vat code snippets", "dong va cach snippets", "dong von cach snippets", "dong ha cach snippets", "dong sat cac snippets", "dong mot cach snippets"
"locating bug core snippets" » "locating bug code snippets"
"dung java java snippets" » "dung va java snippets"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("dong vat cach 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 vat cach snippets") OR ("dung java java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( dong vat cach snippets ) or ( dung java java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong vat cach snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))*.