Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, nhung don
tien manh » tien anh, tien thanh, tieng anh
hang cong » dang cong, hang nong, bang cong
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 tan, van thanh
toan cau » 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 manh) or (dien anh)) - anh tang cua ((nhung cong) OR (hang cong)) van toan 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) OR (hang cong)) van toan 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) OR (hang cong)) van toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((tien manh) or (dien anh)) - anh tang cua ((nhung cong) OR (hang cong)) van toan cau*.