Perhaps you should try some spelling variations:
trien nhan » trien nha, tri nhan, trien khai
vien nganh » vien thanh
tranh cua » doanh cua, manh cua
hang cong » dang cong, hang nong, thanh cong
bang cong » dang cong, bang song, dung cong
dan toan » van toan, dan than, manh 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 ((trien nhan) or (vien nganh)) - canh tranh cua ((hang cong) OR (bang cong)) dan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((trien nhan) OR (vien nganh)) - canh tranh cua ((hang cong) OR (bang cong)) dan toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc ((trien nhan) or (vien nganh)) - canh tranh cua ((hang cong) OR (bang cong)) dan toan ban".
• Adding a wildcard symbol may retrieve word variants: toc ((trien nhan) or (vien nganh)) - canh tranh cua ((hang cong) OR (bang cong)) dan toan ban*.