Perhaps you should try some spelling variations:
thiet tach » chiet tach, thuat tach
thien hach » thien thanh, hien hanh
hanh tranh » canh tranh, hanh trinh, hanh trang
cong thanh » dong thanh, cong trinh, cong tan
tranh cua » doanh cua, manh cua
cong manh » cong danh, duong manh, hoang manh
cua hang » cua dang, cua nhung, cua cong
toan cau » toan cao, toan ban, toan tap

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