Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets"
"dac hoc thieu snippets" » "dac toc thieu snippets", "dac hoc hien snippets", "dai hoc thieu snippets", "dan hoc thieu snippets", "day hoc thieu 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 ("dac hoc thieu snippets"))) OR ("locating bug core snippets"))~.
• Removing quotes may allow a broader search: (((( using java code snippets ) or ( dac hoc thieu snippets ))) or ( locating bug core snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("using java code snippets") or ("dac hoc thieu snippets"))) or ("locating bug core snippets"))*.