Perhaps you should try some spelling variations:
"hoang tranh o snippets" » "hoang thanh o snippets", "hoang tran o snippets", "hoang trang o snippets", "hoang tranh co snippets", "hoang trinh o snippets"
"using java code snippets" » "using data code snippets"
"locating bug core snippets" » "locating bug 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 code snippets") OR ("hoang tranh o snippets"))) OR ("locating bug core snippets"))~.
• Removing quotes may allow a broader search: (((( using java code snippets ) or ( hoang tranh o snippets ))) or ( locating bug core snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("using java code snippets") or ("hoang tranh o snippets"))) or ("locating bug core snippets"))*.