Perhaps you should try some spelling variations:
"dung minh thi snippets" » "duong minh thi snippets", "dung ninh thi snippets", "dung vinh thi snippets", "dung dinh thi snippets", "dung minh tri snippets", "dung minh chi snippets"
"dung java java slippers" » "dung va java slippers", "dung java java slippery", "dung java java grippers"
"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: (((("dung minh thi snippets") or ("dung java java slippers"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung minh thi snippets") OR ("dung java java slippers"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung minh thi snippets ) or ( dung java java slippers ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung minh thi snippets") or ("dung java java slippers"))) or ("locating bug code snippets"))*.