Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"using data java snippets" » "using java java snippets", "using sat java snippets", "missing data java snippets"
"van quan va snippets" » "van ban va snippets", "van quan vi snippets", "van quan ha snippets", "van luan va 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: "((((\"van quan va snippets\") OR (\"using data java snippets\"))) OR (\"locating bug core snippets\"))~".
• Removing quotes may allow a broader search: (((( van quan va snippets ) OR ( using data java snippets ))) OR ( locating bug core snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("van quan va snippets") OR ("using data java snippets"))) OR ("locating bug core snippets"))*.