Perhaps you should try some spelling variations:
"tieu su tu nghiep." » "tieu su su nghiep." (Expand Search), "tieu su tu nghien." (Expand Search), "tieu su thua nghiep." (Expand Search)
"thieu so tu nghiep." » "thieu so su nghiep." (Expand Search), "thieu so tu nghien." (Expand Search), "thieu so thua nghiep." (Expand Search), "thieu so thu nghiep." (Expand Search), "thieu so du nghiep." (Expand Search), "thieu bo tu nghiep." (Expand Search)
"thieu so tu nghiem." » "thieu so thu nghiem." (Expand Search), "thieu so tu nghien." (Expand Search), "thieu so thuc nghiem." (Expand Search), "thieu so du nghiem." (Expand Search), "thieu bo tu nghiem." (Expand Search)

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: (("tieu su tu nghiep.") OR ((("thieu so tu nghiep.") OR ("thieu so tu nghiem."))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"tieu su tu nghiep.\") OR (((\"thieu so tu nghiep.\") OR (\"thieu so tu nghiem.\"))))".
• Removing quotes may allow a broader search: (( tieu su tu nghiep. ) OR ((( thieu so tu nghiep. ) OR ( thieu so tu nghiem. )))).
• Adding a wildcard symbol may retrieve word variants: (("tieu su tu nghiep.") OR ((("thieu so tu nghiep.") OR ("thieu so tu nghiem."))))*.