Perhaps you should try some spelling variations:
"using java core snippets" » "using data core snippets"
"nhung dat doc snippets" » "nhung hat doc snippets", "nhung phat doc snippets", "nhung danh doc snippets", "nhung dat duoc snippets", "nhung day doc snippets", "nhung dat nuoc 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 ("nhung dat doc snippets"))) OR ("locating bug code snippets"))~.
• Removing quotes may allow a broader search: (((( using java core snippets ) or ( nhung dat doc snippets ))) or ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("using java core snippets") or ("nhung dat doc snippets"))) or ("locating bug code snippets"))*.