Perhaps you should try some spelling variations:
"hanh luat chat snippets" » "nganh luat chat snippets", "hang luan chat snippets", "hanh lam chat snippets", "hanh luan chat snippets", "hanh suat chat snippets", "hanh luat dat snippets"
"dung java java snippets" » "dung va java snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("hanh luat chat snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hanh luat chat snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hanh luat chat snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hanh luat chat snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.