Perhaps you should try some spelling variations:
"lan trinh java snippets" » "lap trinh java snippets", "dan trinh java snippets", "lan tranh java snippets"
"dung cong che snippets" » "dung trong che snippets", "dung cong cho snippets", "dung cong chi snippets", "dung cong chu 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: (((("lan trinh java snippets") or ("dung cong che snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("lan trinh java snippets") OR ("dung cong che snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( lan trinh java snippets ) or ( dung cong che snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("lan trinh java snippets") or ("dung cong che snippets"))) or ("locating bug code snippets"))*.