Perhaps you should try some spelling variations:
thieu sach » chieu sach, hieu cach, theo sach
thien hach » thien thanh, hien hanh
cua thuong » cua truong, cua phuong, ca thuong
cong thanh » cong trinh, cong tan, truong thanh
dong thanh » truong thanh
tranh cua » doanh cua, manh cua
ban cau » bang cau, ban can, van cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thieu sach) or (thien hach)) - canh tranh cua thuong ((cong thanh) OR (dong thanh)) ban cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sach) OR (thien hach)) - canh tranh cua thuong ((cong thanh) OR (dong thanh)) ban cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu sach) or (thien hach)) - canh tranh cua thuong ((cong thanh) OR (dong thanh)) ban cau*".