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 data java snippets" » "using java java snippets", "using sat java snippets", "missing 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 data 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 data java snippets") OR ("van truong cac snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( using data java snippets ) or ( van truong cac snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using data java snippets") or ("van truong cac snippets"))) or ("locating bug core snippets"))*.