Perhaps you should try some spelling variations:
"cong chung code snippets" » "cong chung co snippets", "cong hung code snippets", "cong thuong code snippets", "cong cong code snippets", "cong chung code slippers"
"van trinh java snippets" » "van thinh java snippets", "van tinh java snippets", "dan trinh java snippets", "van trinh java slippers"
"locating bug code 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: (((("van trinh java snippets") or ("cong chung code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("van trinh java snippets") OR ("cong chung code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van trinh java snippets ) or ( cong chung code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van trinh java snippets") or ("cong chung code snippets"))) or ("locating bug code snippets"))*.