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