Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets"
"dao hanh core snippets" » "dao hanh cong snippets", "dao hanh che snippets", "dao hanh word snippets", "dao thanh core snippets", "dang hanh core snippets", "ban hanh core snippets"
"locating bug code snippets" » "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 (\"dao hanh core snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( using java code snippets ) OR ( dao hanh core snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("using java code snippets") OR ("dao hanh core snippets"))) OR ("locating bug code snippets"))*.