Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
trinh suat » trinh luat, trinh sat, trinh quan
hoa thiet » hoc thiet, toan thiet, hoa viet
thong anh » thong danh, thong lanh, hong anh
so thiet » soc thiet, hoc thiet, tao thiet
tuan cau » toan cau, quan cau, thuan cam
tuan cu » tuan tu, quan cua, tuan thu

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((so thiet) OR (hoa thiet)) tach - hanh trinh suat thong thong anh ((tuan cau) OR (tuan cu))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so thiet) or (hoa thiet)) tach - hanh trinh suat thong thong anh ((tuan cau) OR (tuan cu))~".
• Adding a wildcard symbol may retrieve word variants: ((so thiet) or (hoa thiet)) tach - hanh trinh suat thong thong anh ((tuan cau) OR (tuan cu))*.