Perhaps you should try some spelling variations:
nhung tuong » nhung huong, nhung phuong, hung vuong
thiet danh » thien danh, thien anh, thien dang
hoc thiet » hoc thieu, hoc thuyet, hoc hien
tranh cua » doanh cua, manh cua
cua nhung » va nhung
van khang » van khanh, van thanh, van quang
dan toan » van toan, dan than, manh toan

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thiet danh - canh tranh cua nhung tuong ((((dan toan) OR (tinh toan))) OR (van khang)) cau~.
• Adding a wildcard symbol may retrieve word variants: hoc thiet danh - canh tranh cua nhung tuong ((((dan toan) or (tinh toan))) or (van khang)) cau*.