Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
tien kinh » trien kinh, tien minh, kien kinh
dien kinh » dien hinh, trien kinh, dien anh
mang cua » manh cua, ban cua, cong cua
dung cua » dung luan, dung cho
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
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 ((tien kinh) or (dien kinh)) - hanh ((mang cua) OR (dung cua)) nhung cong tac toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((tien kinh) OR (dien kinh)) - hanh ((mang cua) OR (dung cua)) nhung cong tac toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((tien kinh) or (dien kinh)) - hanh ((mang cua) OR (dung cua)) nhung cong tac toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((tien kinh) or (dien kinh)) - hanh ((mang cua) OR (dung cua)) nhung cong tac toan cao*.