Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets"
"tim lieu data snippets" » "tim lieu dao snippets", "tim bieu dat snippets", "tim lieu da snippets", "tim hieu data snippets", "tai lieu data snippets", "tri lieu data 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 ("tim lieu data snippets"))) OR ("locating bug core snippets"))~.
• Removing quotes may allow a broader search: (((( using java code snippets ) or ( tim lieu data snippets ))) or ( locating bug core snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("using java code snippets") or ("tim lieu data snippets"))) or ("locating bug core snippets"))*.