Perhaps you should try some spelling variations:
"trong trinh luan snippets" » "trong tinh luan snippets", "trang trinh luan snippets", "trong thinh luan snippets", "trong trinh luat snippets", "trong trinh quan snippets", "trong trinh han snippets", "trong trinh luan slippers"
"using a code snippets" » "using a core snippets", "using a code slippers"
"locating bug code snippets" » "locating bug core snippets", "locating bug code slippers", "locating bung code snippets", "locating bugs code 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 a code snippets") or ("trong trinh luan snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using a code snippets") OR ("trong trinh luan snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( using a code snippets ) or ( trong trinh luan snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using a code snippets") or ("trong trinh luan snippets"))) or ("locating bug code snippets"))*.