Perhaps you should try some spelling variations:
"trinh tin code snippets" » "trinh kinh code snippets", "trinh toan code snippets", "trinh tu code snippets", "trinh tin co snippets", "trinh tin code slippers"
"dang hung code snippets" » "dang quang code snippets", "manh hung code snippets", "dang cong code snippets", "dang hung code 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: (((("trinh tin code snippets") or ("dang hung code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("trinh tin code snippets") OR ("dang hung code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( trinh tin code snippets ) or ( dang hung code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trinh tin code snippets") or ("dang hung code snippets"))) or ("locating bug code snippets"))*.