Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"trong ba model snippets" » "trong ban model snippets", "trong bau model snippets", "trong ca model snippets", "trong a model snippets", "trong cad model snippets", "trong 1 model 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: (((("trong ba model snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("trong ba model snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( trong ba model snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trong ba model snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.