Perhaps you should try some spelling variations:
thiet tach » chiet tach, thien hach
thuat tach » thuat sach, thuat mach, thuat tac
nhung cong » dung cong, thong cong, hang cong
chinh cua » chinh ca, chinh sua, hinh cua
cua nhung » va nhung
ban thanh » ban hanh, ban hang
van toan » van tuan, van tan, van thanh

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