Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets"
"bach van duc snippets" » "bach dan duc snippets", "cach van duc snippets", "bach dang duc snippets", "bach van duy snippets", "bach van du snippets", "bach tran duc snippets"
"locating bug core snippets" » "locating bug code snippets"

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using java code snippets") OR ("bach van duc snippets"))) OR ("locating bug core snippets"))~.
• Removing quotes may allow a broader search: (((( using java code snippets ) or ( bach van duc snippets ))) or ( locating bug core snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("using java code snippets") or ("bach van duc snippets"))) or ("locating bug core snippets"))*.