Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, hieu manh
thanh tung » thanh cong
trinh than » trinh thanh, trinh han, trinh toan
dang cong » dung cong
hoc hieu » hoc thieu, hoc hien, doc hieu
cua dang » cua cong, cua ban
than cau » toan cau, phan cau, than cap

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 - ((thanh trung) OR (thanh tung)) cua dang cong trinh than cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hieu nganh - ((thanh trung) OR (thanh tung)) cua dang cong trinh than cau".
• Adding a wildcard symbol may retrieve word variants: hoc hieu nganh - ((thanh trung) OR (thanh tung)) cua dang cong trinh than cau*.