Perhaps you should try some spelling variations:
nhung phuong » dung phuong, nhu phuong, truong phuong
thiet tach » chiet tach, thien hach, thuat tach
hanh trinh » canh tranh, hanh chinh
nhung cong » dung cong, thong cong, hang cong
trinh cua » tinh cua, trinh luat, trinh quan
ho thiet » hoc thiet, hoa thiet, so thiet
van tuan » van ban, anh tuan
van quan » van ban

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 trinh cua ((nhung cong) or (nhung phuong)) ((van tuan) OR (van quan)) tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho thiet tach - hanh trinh cua ((nhung cong) OR (nhung phuong)) ((van tuan) OR (van quan)) tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho thiet tach - hanh trinh cua ((nhung cong) or (nhung phuong)) ((van tuan) OR (van quan)) tap".
• Adding a wildcard symbol may retrieve word variants: ho thiet tach - hanh trinh cua ((nhung cong) or (nhung phuong)) ((van tuan) OR (van quan)) tap*.