Perhaps you should try some spelling variations:
"tran thach giang." » "tran thanh giang." (Expand Search), "tranh thanh giang." (Expand Search), "trang thanh giang." (Expand Search)
"tran bach giang." » "tran bac giang." (Expand Search), "tran cach giang." (Expand Search), "tran bai giang." (Expand Search), "tran manh giang." (Expand Search), "tran binh giang." (Expand Search), "tran anh giang." (Expand Search)
"tran van giang." » "tran va giang." (Expand Search), "tran tuan giang." (Expand Search), "tran tran giang." (Expand Search), "luan van giang." (Expand Search), "san van giang." (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: (("tran van giang.") OR ((("tran bach giang.") OR ("tran thach giang."))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"tran van giang.\") OR (((\"tran bach giang.\") OR (\"tran thach giang.\"))))".
• Removing quotes may allow a broader search: (( tran van giang. ) OR ((( tran bach giang. ) OR ( tran thach giang. )))).
• Adding a wildcard symbol may retrieve word variants: (("tran van giang.") OR ((("tran bach giang.") OR ("tran thach giang."))))*.