Perhaps you should try some spelling variations:
doan thien » hoan thien, doan thi, toan thiet
nhung cong » dung cong, thong cong, hang cong
thien anh » thien danh, tien anh, thien thanh
tranh cua » doanh cua, manh cua
cua nhung » va nhung
manh toan » thanh toan, anh tuan, tinh toan
van tuan » van quan, van ban, anh tuan

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

• Performing a fuzzy search may retrieve terms with similar spellings: doan thien anh - canh tranh cua nhung cong ((van tuan) or (manh toan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doan thien anh - canh tranh cua nhung cong ((van tuan) OR (manh toan)) cao.
• Adding a wildcard symbol may retrieve word variants: doan thien anh - canh tranh cua nhung cong ((van tuan) or (manh toan)) cao*.