Perhaps you should try some spelling variations:
"missing data java slippers" » "using data java slippers", "missing java java slippers", "missing data java slippery", "missing data java grippers"
"vi tran van snippets" » "vi luan van snippets", "vi trang van snippets", "v tran van snippets", "vi than van 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: "((((\"missing data java slippers\") OR (\"vi tran van snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( missing data java slippers ) OR ( vi tran van snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("missing data java slippers") OR ("vi tran van snippets"))) OR ("locating bug code snippets"))*.