Perhaps you should try some spelling variations:
"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)
"tran ha giang." » "tran bai giang." (Expand Search), "tran bac giang." (Expand Search), "tran hai giang." (Expand Search), "tran hau giang." (Expand Search), "tran ba giang." (Expand Search)
"tran vu giang." » "tran va giang." (Expand Search), "tran lu giang." (Expand Search), "tran thu giang." (Expand Search), "tran duc giang." (Expand Search), "tran huu 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 ha giang.") OR ("tran vu giang."))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"tran van giang.\") OR (((\"tran ha giang.\") OR (\"tran vu giang.\"))))".
• Removing quotes may allow a broader search: (( tran van giang. ) OR ((( tran ha giang. ) OR ( tran vu giang. )))).
• Adding a wildcard symbol may retrieve word variants: (("tran van giang.") OR ((("tran ha giang.") OR ("tran vu giang."))))*.