Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
cua nhung » va nhung
tien manh » tien anh, tien thanh, tieng anh
dien anh » tieng anh, dien dan
anh tang » anh bang, anh dang, anh nang
tang cua » mang cua, hang cua, tang luan
van toan » van tuan, van thanh, manh toan
van tan » van tuan, van ban, van tai

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 manh) or (dien anh)) - anh tang cua nhung cong ((van toan) OR (van tan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((tien manh) OR (dien anh)) - anh tang cua nhung cong ((van toan) OR (van tan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((tien manh) or (dien anh)) - anh tang cua nhung cong ((van toan) OR (van tan)) cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((tien manh) or (dien anh)) - anh tang cua nhung cong ((van toan) OR (van tan)) cau*.