Perhaps you should try some spelling variations:
"thanh tran cong snippets" » "thanh trang cong snippets", "thanh toan cong snippets", "thanh tra cong snippets", "thanh tran hong snippets", "thanh trien cong snippets", "thanh tran hoang 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: (((("thanh tran 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: (((("thanh tran cong snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thanh tran cong snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thanh tran cong snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.