Perhaps you should try some spelling variations:
main » mai
bang » ban, nang, dang
mieng » tieng, mien, vieng
rieng » tieng
vien » viet, bien
han » phan, nhan, hang
pthan » ptphan, ptnhan, pthang, phan, than, ethan
hanh » phanh, nhanh, hangh, thanh, anh, hinh
pnhan » pnphan, pnnhan, pnhang, phan, nhan

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: emperor ((main or bang) or ((mieng OR rieng) or vien)) of (((han or pthan) or hanh) or pnhan)~.
• If you are trying to use Boolean operators, they must be ALL CAPS: emperor ((main OR bang) OR ((mieng OR rieng) OR vien)) of (((han OR pthan) OR hanh) OR pnhan).
• The words AND, OR and NOT may confuse the search; try adding quotes: "emperor ((main or bang) or ((mieng OR rieng) or vien)) of (((han or pthan) or hanh) or pnhan)".
• Adding a wildcard symbol may retrieve word variants: emperor ((main or bang) or ((mieng OR rieng) or vien)) of (((han or pthan) or hanh) or pnhan)*.