Perhaps you should try some spelling variations:
phuong cong » phuong dong, phong cong, phung cong
thiet tach » chiet tach, thuat tach
thien hach » thien thanh, hien hanh
tranh cua » manh cua
doanh cua » doanh luan
dan thanh » dang thanh, danh thanh, ban thanh
cong dan » cong san, cong tan, huong dan

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) or (thien hach)) - canh ((tranh cua) OR (doanh cua)) phuong cong dan thanh san~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thiet tach) OR (thien hach)) - canh ((tranh cua) OR (doanh cua)) phuong cong dan thanh san.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thiet tach) or (thien hach)) - canh ((tranh cua) OR (doanh cua)) phuong cong dan thanh san".
• Adding a wildcard symbol may retrieve word variants: hoc ((thiet tach) or (thien hach)) - canh ((tranh cua) OR (doanh cua)) phuong cong dan thanh san*.