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