Perhaps you should try some spelling variations:
"using java core snippets" » "using data core snippets"
"dang huy tran snippets" » "dang thuy tran snippets", "dong huy tran snippets", "dang huu tran snippets", "dang thuy trang snippets", "dang hung tran snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code 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 core snippets") or ("dang huy tran snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using java core snippets") OR ("dang huy tran snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( using java core snippets ) or ( dang huy tran snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using java core snippets") or ("dang huy tran snippets"))) or ("locating bug code snippets"))*.