Perhaps you should try some spelling variations:
trinh thiet » trinh viet, trinh thi
thiet luan » thien luan, thi luan, thien quan
nguoi lieu » nguoi tieu, nguoi dieu, nguoi thieu
trien nhan » trien nha, tri nhan, trien khai
lieu khoa » lieu hoc
vien than » vien thanh, dien than, vien nhan
khoa hoc » hoa hoc
dien han » dien phan, dien than, dien dan
van cua » vang cua, ban cua, dan cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: giao trinh thiet luan van cua nguoi lieu khoa hoc ((dien han) or (((vien than) or (trien nhan))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: giao trinh thiet luan van cua nguoi lieu khoa hoc ((dien han) OR (((vien than) OR (trien nhan)))).
• Adding a wildcard symbol may retrieve word variants: giao trinh thiet luan van cua nguoi lieu khoa hoc ((dien han) or (((vien than) or (trien nhan))))*.