Perhaps you should try some spelling variations:
"locating bugs code snippets" » "locating bug code snippets"
"vi trung hoc snippets" » "vi trung quoc snippets", "va trung hoc snippets", "viet trung hoc snippets", "vien trung hoc 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.

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