Perhaps you should try some spelling variations:
"van duong cong snippets" » "van duong code snippets", "van dung cong snippets", "van luong cong snippets", "van duong trong snippets", "van dong cong snippets", "van phong cong snippets"
"locating bug core snippets" » "locating bug code snippets"
"using sat java snippets" » "using data java snippets", "using a java snippets", "using raw java snippets", "using sat va 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 sat java snippets") or ("van duong cong snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using sat java snippets") OR ("van duong cong snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( using sat java snippets ) or ( van duong cong snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using sat java snippets") or ("van duong cong snippets"))) or ("locating bug core snippets"))*.