Perhaps you should try some spelling variations:
thanh chung » thanh chuong, thanh hung, thanh phuong
thiet tach » chiet tach, thien hach, thuat tach
nhung cong » dung cong, thong cong, hang cong
hoc thiet » hoc thieu, hoc thuyet, hoc hien
chung cua » chung cu, dung cua, huong cua
cua nhung » va nhung
ban than » ban thanh, van thanh, ban hang

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thiet tach - thanh chung cua nhung cong ((tam than) or (ban than)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thiet tach - thanh chung cua nhung cong ((tam than) OR (ban than)) cau.
• Adding a wildcard symbol may retrieve word variants: hoc thiet tach - thanh chung cua nhung cong ((tam than) or (ban than)) cau*.