Perhaps you should try some spelling variations:
"missing data java snippets" » "using data java snippets", "missing java java snippets"
"va hinh hoc snippets" » "va sinh hoc snippets", "va tin hoc snippets", "va benh hoc snippets", "va chinh hoc snippets", "va kinh hoc snippets", "va tinh hoc 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: "((((\"va hinh hoc snippets\") OR (\"missing data java snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( va hinh hoc snippets ) OR ( missing data java snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("va hinh hoc snippets") OR ("missing data java snippets"))) OR ("locating bug code snippets"))*.