Perhaps you should try some spelling variations:
"luong java java snippets" » "luong va java snippets"
"cong trinh ca snippets" » "cong trinh cau snippets", "cong trinh cua snippets", "cong trinh cac snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"luong java java snippets\") OR (\"cong trinh ca snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( luong java java snippets ) OR ( cong trinh ca snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("luong java java snippets") OR ("cong trinh ca snippets"))) OR ("locating bug code snippets"))*.