Perhaps you should try some spelling variations:
hieu xanh » chieu xanh, hieu manh, hieu nganh
hanh tran » hanh trang, thanh tran, hanh tram
tran toan » tranh toan, tran tuan, tran tan
toan tong » toan thong, toan trong, toan cong
tong cong » trong cong, cong cong, dung cong
doc hieu » toc thieu, hoc thieu, hoc hien
cong van » cong vang, cong san, song van
tuan ban » tuan bang, toan ban, quang ban
luan ban » luan van, luan san, luan han

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc hieu xanh - hanh tran toan tong cong van ((tuan ban) OR (luan ban))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu xanh - hanh tran toan tong cong van ((tuan ban) OR (luan ban))*".