Perhaps you should try some spelling variations:
thien chanh » thien thanh, thien chinh, hien hanh
thien danh » thien anh, thien dang, thien thanh
tranh cua » doanh cua, manh cua
cua trung » cua truong, xuan trung, cua nhung
uong tac » tuong tac, huong tac, muong tac
tac toan » tap toan, tam toan, hach 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: toc ((thien danh) or (thien chanh)) - canh tranh cua trung uong tac toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((thien danh) OR (thien chanh)) - canh tranh cua trung uong tac toan ban.
• Adding a wildcard symbol may retrieve word variants: toc ((thien danh) or (thien chanh)) - canh tranh cua trung uong tac toan ban*.