Perhaps you should try some spelling variations:
nhung phuong » dung phuong, nhu phuong, truong phuong
nhung cong » dung cong, thong cong, hang cong
thiet tach » chiet tach, thien hach, thuat tach
hanh tang » hanh trang, hanh mang, hanh tung
ho thiet » hoc thiet, hoa thiet, so thiet
anh tang » anh bang, anh dang, anh nang
ban tap » bai tap, han tap, ban tai

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 tach - ((hanh tang) or (anh tang)) cua ((nhung cong) or (nhung phuong)) van ban tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho thiet tach - ((hanh tang) OR (anh tang)) cua ((nhung cong) OR (nhung phuong)) van ban tap.
• Adding a wildcard symbol may retrieve word variants: ho thiet tach - ((hanh tang) or (anh tang)) cua ((nhung cong) or (nhung phuong)) van ban tap*.