Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"van truong cac snippets" » "van truong code snippets", "tang truong cac snippets", "xuan truong cac snippets", "vien truong cac snippets", "van truong cao snippets", "van trong cac snippets", "van truong ca snippets"
"using raw java snippets" » "using real java snippets", "using a java snippets", "using low 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 raw java snippets") or ("van truong cac snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using raw java snippets") OR ("van truong cac snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( using raw java snippets ) or ( van truong cac snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using raw java snippets") or ("van truong cac snippets"))) or ("locating bug core snippets"))*.