Perhaps you should try some spelling variations:
"trinh van ngoc snippets" » "trinh han ngoc snippets", "trinh quan ngoc snippets", "trinh toan ngoc snippets", "trinh tran ngoc snippets", "trinh van hoc snippets", "trinh van nghe snippets", "trinh van ngoc slippers"
"dung bug code snippets" » "dung dung code snippets", "dung hung code snippets", "dung rung code snippets", "dung bug code slippers", "dung bug core snippets"
"locating bug code snippets" » "locating bug code slippers", "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: (((("trinh van ngoc snippets") or ("dung bug code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("trinh van ngoc snippets") OR ("dung bug code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( trinh van ngoc snippets ) or ( dung bug code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trinh van ngoc snippets") or ("dung bug code snippets"))) or ("locating bug code snippets"))*.