Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets"
"de doan thi snippets" » "de dan thi snippets", "de doanh tai snippets", "de hoang thi snippets", "de doanh thi snippets", "le doan thi snippets", "du doan thi 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 ("de doan thi snippets"))) OR ("locating bug core snippets"))~.
• Removing quotes may allow a broader search: (((( using java code snippets ) or ( de doan thi snippets ))) or ( locating bug core snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("using java code snippets") or ("de doan thi snippets"))) or ("locating bug core snippets"))*.