Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, hieu manh
luan trong » quan trong, luat trong, luan tuong
hanh tang » hanh trang, anh tang, hanh mang
tang luan » dung luan
tich toan » tinh toan, tich than, trinh toan
hoc hieu » hoc thieu, hoc hien, doc hieu
tac toan » tap toan, hach toan, tac thanh
tam toan » tap toan, tam than, pham toan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hieu nganh - hanh tang luan trong cong ((((tac toan) or (tich toan))) or (tam toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu nganh - hanh tang luan trong cong ((((tac toan) OR (tich toan))) OR (tam toan)) cau.
• Adding a wildcard symbol may retrieve word variants: hoc hieu nganh - hanh tang luan trong cong ((((tac toan) or (tich toan))) or (tam toan)) cau*.