Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
thien chanh » thien chinh, hien hanh, tien thanh
hanh tranh » canh tranh, hanh trinh, hanh trang
tranh cua » doanh cua, manh cua
cua trong » cua truong, cua trung, qua trong
cong tap » cuong tap, cong tac, cong tan
tap toan » tap doan, tap quan, bai 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 thanh) or (thien chanh)) - hanh tranh cua trong cong tap toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((thien thanh) OR (thien chanh)) - hanh tranh cua trong cong tap toan ban.
• Adding a wildcard symbol may retrieve word variants: toc ((thien thanh) or (thien chanh)) - hanh tranh cua trong cong tap toan ban*.