Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
thiet danh » thien danh, thien dang, tiep danh
thien anh » thien danh, tien anh, thien thanh
tranh cua » doanh cua, manh cua
cua trong » cua truong, cua trung, qua trong
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan ban » van ban

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 danh) OR (thien anh)) - hanh tranh cua trong cong san toan ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thiet danh) OR (thien anh)) - hanh tranh cua trong cong san toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((thiet danh) OR (thien anh)) - hanh tranh cua trong cong san toan ban*.