Perhaps you should try some spelling variations:
hien nhanh » hien hanh, thien thanh, tien thanh
nhung cong » dung cong, thong cong, hang cong
quang cua » quang tuan, quang huy, dung cua
quan cua » quan luan, ban cua, gian cua
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((dieu hanh) or (hien nhanh)) - anh ((quang cua) OR (quan cua)) nhung cong san toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((dieu hanh) OR (hien nhanh)) - anh ((quang cua) OR (quan cua)) nhung cong san toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((dieu hanh) or (hien nhanh)) - anh ((quang cua) OR (quan cua)) nhung cong san toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((dieu hanh) or (hien nhanh)) - anh ((quang cua) OR (quan cua)) nhung cong san toan cau*.