Perhaps you should try some spelling variations:
tranh luan » trinh luan, trinh luat, doanh luan
tieu sach » chieu sach, dien sach, te sach
hang cong » dang cong, hang nong, thanh cong
bang cong » dang cong, bang song, dung cong
dan than » dan chan, ban than, van than
than cao » toan cao, thai cao, than cap

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 sach - canh tranh luan ((hang cong) OR (bang cong)) dan than cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo tieu sach - canh tranh luan ((hang cong) OR (bang cong)) dan than cao".
• Adding a wildcard symbol may retrieve word variants: theo tieu sach - canh tranh luan ((hang cong) OR (bang cong)) dan than cao*.