Perhaps you should try some spelling variations:
"dung trong duan snippets" » "dung trong quan snippets", "dung trong dan snippets", "dung trong tuan snippets"
"using low dose snippets" » "using low noise snippets", "using low cost 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: (((("using low dose snippets") or ("dung trong duan snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using low dose snippets") OR ("dung trong duan snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( using low dose snippets ) or ( dung trong duan snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using low dose snippets") or ("dung trong duan snippets"))) or ("locating bug code snippets"))*.