Perhaps you should try some spelling variations:
"dinh toan cong snippets" » "tinh toan cong snippets", "hinh toan cong snippets", "minh toan cong snippets", "dinh tran cong snippets", "dinh toan thong snippets", "dinh doan cuong snippets"
"dung co code snippets" » "dung cho code snippets", "dung cong code snippets", "dung cua code snippets", "dung cfd code snippets"
"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: (((("dinh toan cong snippets") or ("dung co code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dinh toan cong snippets") OR ("dung co code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dinh toan cong snippets ) or ( dung co code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dinh toan cong snippets") or ("dung co code snippets"))) or ("locating bug code snippets"))*.