Perhaps you should try some spelling variations:
thiet hach » thien hach, thuyet hach, thiet hai
hinh trong » chinh trong, dinh trong, sinh trong
nhung cong » dung cong, thong cong, hang cong
trong cua » truong cua, thong cua, trong ca
dang cong » dung cong
manh toan » thanh toan, anh tuan, tinh toan
ho thiet » hoc thiet, hoa thiet, so thiet
toan ban » 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 hach - hinh trong cua ((nhung cong) or (dang cong)) manh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho thiet hach - hinh trong cua ((nhung cong) OR (dang cong)) manh toan ban.
• Adding a wildcard symbol may retrieve word variants: ho thiet hach - hinh trong cua ((nhung cong) or (dang cong)) manh toan ban*.