Perhaps you should try some spelling variations:
"cong thanh code snippets" » "dong thanh code snippets", "cong trinh code snippets", "cong tan code snippets", "cong thanh cong snippets", "cong thanh de snippets"
"trong cac code slippers" » "trong cac cong slippers", "trong cac co slippers", "trong cac che slippers"
"locating bug code snippets" » "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: (((("trong cac code slippers") or ("cong thanh code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("trong cac code slippers") OR ("cong thanh code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( trong cac code slippers ) or ( cong thanh code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trong cac code slippers") or ("cong thanh code snippets"))) or ("locating bug code snippets"))*.