Perhaps you should try some spelling variations:
toan thiet » hoan thien, luan thiet, toan tien
thiet anh » thien anh, thuyet anh, thien danh
va tuong » va thuong, va thong, xa truong
cong ban » cong bang, cong san, cong tan
ban phan » ban phap, van phan, ban than
phan tap » phan lap, han tap, pha tap
va cong » tai cong, cua cong

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

• Performing a fuzzy search may retrieve terms with similar spellings: toan thiet anh - canh tranh ((va cong) or (va tuong)) cong ban phan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toan thiet anh - canh tranh ((va cong) OR (va tuong)) cong ban phan tap.
• Adding a wildcard symbol may retrieve word variants: toan thiet anh - canh tranh ((va cong) or (va tuong)) cong ban phan tap*.