Perhaps you should try some spelling variations:
tieu trinh » tien trinh, tien thinh, trieu tinh
tranh tuan » tran tuan, tranh luan, thanh tuan
tieu tinh » trieu tinh, lieu tinh, kieu tinh
tuan nang » luan nang, xuan nang, tuan bang
nang cong » nang song, dang cong, bang cong
dan toan » dan than, manh toan, xuan toan
van toan » van tuan, van tan, van thanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((tieu tinh) or (tieu trinh)) - canh tranh tuan nang cong ((dan toan) OR (van toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((tieu tinh) OR (tieu trinh)) - canh tranh tuan nang cong ((dan toan) OR (van toan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((tieu tinh) or (tieu trinh)) - canh tranh tuan nang cong ((dan toan) OR (van toan)) cau".
• Adding a wildcard symbol may retrieve word variants: theo ((tieu tinh) or (tieu trinh)) - canh tranh tuan nang cong ((dan toan) OR (van toan)) cau*.