Perhaps you should try some spelling variations:
"truan dong tinh snippets" » "tran dong tinh snippets", "truyen dong tinh snippets", "truong dong tinh snippets", "truan dong kinh snippets", "truan dong tin snippets", "truan cong tinh snippets", "truan dong tinh slippers"
"dung java java snippets" » "dung va java snippets", "dung java java slippers"
"locating bug code snippets" » "locating bug code slippers", "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: (((("truan dong tinh snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("truan dong tinh snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( truan dong tinh snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("truan dong tinh snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.