Perhaps you should try some spelling variations:
"trinh tho viet snippets" » "trinh thao viet snippets", "trinh theo viet snippets", "trinh thoi viet snippets", "trinh thon viet snippets", "trinh thong viet snippets", "trinh hoc viet snippets", "trinh tho viet 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 tho viet 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 tho viet snippets") OR ("dung bug code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( trinh tho viet snippets ) or ( dung bug code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trinh tho viet snippets") or ("dung bug code snippets"))) or ("locating bug code snippets"))*.