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