Perhaps you should try some spelling variations:
"vi ung cong snippets" » "vi ung code snippets", "vi dung cong snippets", "vi luong cong snippets", "vi duong cong snippets", "va ung cong snippets", "vi trung 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: (((("using java java snippets") or ("vi ung cong snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using java java snippets") OR ("vi ung cong snippets"))) OR ("locating bug core snippets"))*.
• Removing quotes may allow a broader search: (((( using java java snippets ) or ( vi ung cong snippets ))) or ( locating bug core snippets ))*.