Perhaps you should try some spelling variations:
thiet danh » thien danh, thien dang, tiep danh
thien anh » thien danh, tien anh, thien thanh
tranh cua » doanh cua, manh cua
tong cong » trong cong, cong cong, dung cong
cua tong » cua cong, cua dong, cua nong
cong dan » cong san, cong tan, huong dan
dan hang » ban hang, van hang, dat hang
hang dau » hang va, hang tai

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)) - canh tranh cua tong cong dan hang dau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thiet danh) OR (thien anh)) - canh tranh cua tong cong dan hang dau*".