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, dung cong, dang cong
cong cong » cong dong, trong cong, dung cong
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) OR (cong cong)) dan hang dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thiet danh) OR (thien anh)) - canh tranh cua ((tong cong) OR (cong 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) OR (cong cong)) dan hang dau".
• Adding a wildcard symbol may retrieve word variants: hoc ((thiet danh) or (thien anh)) - canh tranh cua ((tong cong) OR (cong cong)) dan hang dau*.