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