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