Perhaps you should try some spelling variations:
"anh java java snippets" » "anh va java snippets"
"dung van chi snippets" » "duong van chi snippets", "dung va chi snippets", "dang van chi snippets", "dung van chien snippets", "dung luan chi snippets", "dung van chat 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: (((("anh java java snippets") or ("dung van chi snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("anh java java snippets") OR ("dung van chi snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( anh java java snippets ) or ( dung van chi snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("anh java java snippets") or ("dung van chi snippets"))) or ("locating bug code snippets"))*.