Perhaps you should try some spelling variations:
"tranh hang de snippets" » "trinh han de snippets", "tran hoang de snippets", "tranh hoang de snippets", "tranh hanh de snippets", "tranh hang di 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: (((("tranh hang de snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tranh hang de snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tranh hang de snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tranh hang de snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.