Perhaps you should try some spelling variations:
"dung cac thuc snippets" » "dung cach thuc snippets", "dung cac thu snippets", "dung can thuc snippets", "luong cac thuc snippets", "dung cho thuc snippets", "dung tai thuc snippets", "dung cac thuc slippers"
"cong trinh java snippets" » "cong trinh java slippers"
"locating bug code snippets" » "locating bug code slippers", "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: (((("cong trinh java snippets") or ("dung cac thuc snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cong trinh java snippets") OR ("dung cac thuc snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong trinh java snippets ) or ( dung cac thuc snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong trinh java snippets") or ("dung cac thuc snippets"))) or ("locating bug code snippets"))*.