Perhaps you should try some spelling variations:
"cong dung java snippets" » "cuong dung java snippets", "cong dong java snippets", "cong luong java snippets", "cong dung va snippets"
"using low dose snippets" » "using low noise snippets", "using low cost snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("using low dose snippets") or ("cong dung java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using low dose snippets") OR ("cong dung java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( using low dose snippets ) or ( cong dung java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using low dose snippets") or ("cong dung java snippets"))) or ("locating bug code snippets"))*.