Perhaps you should try some spelling variations:
"tranh ban cong snippets" » "trinh ban cong snippets", "tranh hang cong snippets", "tranh luan cong snippets", "tranh bang cong snippets", "tranh van cong snippets", "tranh phan cong 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 ban cong 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 ban cong snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tranh ban cong snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tranh ban cong snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.