Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets"
"than hoc cau snippets" » "toan hoc cau snippets", "thai hoc cau snippets", "than doc cau snippets", "than hoc cao snippets", "than hoc cac snippets", "than hoc can 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 ("than hoc cau snippets"))) OR ("locating bug core snippets"))~.
• Removing quotes may allow a broader search: (((( using java code snippets ) or ( than hoc cau snippets ))) or ( locating bug core snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("using java code snippets") or ("than hoc cau snippets"))) or ("locating bug core snippets"))*.