Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, hieu manh
hanh sinh » hanh tinh, hanh dinh, hinh sinh
dung cong » dung trong
danh toan » manh toan, anh toan, dang toan
toc hieu » toc thieu, doc hieu, hoc thieu
sinh cua » manh cua, dinh cuu, sinh va
cua dung » cua dang, cua dong, qua dung
dan toan » van toan, dan than, manh toan

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "toc hieu nganh - hanh sinh cua dung cong ((danh toan) OR (dan toan)) cau~".
• Adding a wildcard symbol may retrieve word variants: toc hieu nganh - hanh sinh cua dung cong ((danh toan) OR (dan toan)) cau*.