Perhaps you should try some spelling variations:
"vu duong cong snippets" » "vu duong code snippets", "vu dung cong snippets", "vu luong cong snippets", "vu duong trong snippets", "va duong cong snippets", "van duong cong snippets", "cau duong 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 ("vu duong 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 ("vu duong cong snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( using java java snippets ) or ( vu duong cong snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using java java snippets") or ("vu duong cong snippets"))) or ("locating bug core snippets"))*.