Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets", "using java core snippets"
"don doi chieu snippets" » "don doc hieu snippets", "don doi chi snippets", "don ho chieu snippets", "dong doi chieu snippets", "uon doi chieu snippets", "duong doi chieu snippets"
"locating bug code snippets" » "locating bug core 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 (\"don doi chieu snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( using java code snippets ) OR ( don doi chieu snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("using java code snippets") OR ("don doi chieu snippets"))) OR ("locating bug code snippets"))*.