Perhaps you should try some spelling variations:
"using java core snippets" » "using data core snippets"
"hoang tran so snippets" » "hoang tuan so snippets", "hoang thanh so snippets", "hoang van so snippets", "hoang tran si snippets", "hoang tran sy snippets", "hoang than so 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.

• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using java core snippets") OR ("hoang tran so snippets"))) OR ("locating bug code snippets"))~.
• Removing quotes may allow a broader search: (((( using java core snippets ) or ( hoang tran so snippets ))) or ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("using java core snippets") or ("hoang tran so snippets"))) or ("locating bug code snippets"))*.