Perhaps you should try some spelling variations:
nhung phuong » dung phuong, nhu phuong, truong phuong
nhung cong » dung cong, thong cong, hang cong
hoc thiet » hoc thieu, hoc thuyet, hoc hien
ho thiet » hoa thiet, so thiet, hoc thieu
anh tang » anh bang, anh dang, anh nang
tang cua » mang cua, hang cua, tang luan
van tai » von tai, van tuan
tai tap » bai tap, tai tao, hai tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho thiet) or (hoc thiet)) tach - anh tang cua ((nhung cong) or (nhung phuong)) van tai tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho thiet) OR (hoc thiet)) tach - anh tang cua ((nhung cong) OR (nhung phuong)) van tai tap.
• Adding a wildcard symbol may retrieve word variants: ((ho thiet) or (hoc thiet)) tach - anh tang cua ((nhung cong) or (nhung phuong)) van tai tap*.