Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets"
"dung chi hanh snippets" » "dung cho hanh snippets", "dung thi hanh snippets", "dung chien hanh snippets", "dung chi nhanh snippets", "dung chi thanh snippets"
"locating bug core snippets" » "locating bug code snippets"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("using java code snippets") OR ("dung chi hanh snippets"))) OR ("locating bug core snippets"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"using java code snippets\") OR (\"dung chi hanh snippets\"))) OR (\"locating bug core snippets\"))*".
• Removing quotes may allow a broader search: (((( using java code snippets ) OR ( dung chi hanh snippets ))) OR ( locating bug core snippets ))*.