Perhaps you should try some spelling variations:
"trinh doan tinh snippets" » "trinh toan tinh snippets", "thinh doan tinh snippets", "trinh dan tinh snippets", "trinh doan hinh snippets", "trinh ban tinh snippets", "trinh quan tinh snippets", "trinh doan tinh 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 doan tinh 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 doan tinh snippets") OR ("dung bug code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( trinh doan tinh snippets ) or ( dung bug code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trinh doan tinh snippets") or ("dung bug code snippets"))) or ("locating bug code snippets"))*.