Perhaps you should try some spelling variations:
"locating bugs code snippets" » "locating bug code snippets"
"using java java snippets" » "using data java snippets"
"vi trung pre snippets" » "vi trung tren snippets", "vi trung tri snippets", "va trung pre snippets", "viet trung pre snippets", "vien trung pre 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: "((((\"vi trung pre snippets\") OR (\"using java java snippets\"))) OR (\"locating bugs code snippets\"))~".
• Removing quotes may allow a broader search: (((( vi trung pre snippets ) OR ( using java java snippets ))) OR ( locating bugs code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("vi trung pre snippets") OR ("using java java snippets"))) OR ("locating bugs code snippets"))*.