Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets", "using java core snippets", "using java code slippers"
"hoi hoc trong snippets" » "hoi hoc thuong snippets", "hoi hoc tieng snippets", "hoi dot trong snippets", "hoa hoc trong snippets", "khoa hoc trong snippets", "hoi chuc trong snippets", "hoi hoc trong slippers"
"locating bug code snippets" » "locating bug core snippets", "locating bug code slippers", "locating bung code snippets", "locating bugs code 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: "((((\"using java code snippets\") OR (\"hoi hoc trong snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( using java code snippets ) OR ( hoi hoc trong snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("using java code snippets") OR ("hoi hoc trong snippets"))) OR ("locating bug code snippets"))*.