Perhaps you should try some spelling variations:
"viet hung cong snippets" » "viet hung code snippets", "viet huong cong snippets", "viet trung cong snippets", "viet nhung cong snippets", "viet hung cuong snippets", "viet phung cong snippets"
"locating bug core snippets" » "locating bug code snippets"
"using java java snippets" » "using data 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: (((("viet hung cong snippets") or ("using java java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("viet hung cong snippets") OR ("using java java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( viet hung cong snippets ) or ( using java java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("viet hung cong snippets") or ("using java java snippets"))) or ("locating bug core snippets"))*.