Perhaps you should try some spelling variations:
chiet tach » chieu sach
tranh tuan » tran tuan, tranh luan, thanh tuan
hoc chiet » hoc thiet, hoc nhiet, hoc hien
hang cong » dang cong, bang cong, thanh cong
tong cong » trong cong, cong cong, dung cong
hang nong » thang long, han tong
dan than » dan chan, ban than, van than
than cap » khan cap, thanh lap, thanh cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc chiet tach - canh tranh tuan ((((hang cong) or (tong cong))) or (hang nong)) dan than cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chiet tach - canh tranh tuan ((((hang cong) OR (tong cong))) OR (hang nong)) dan than cap.
• Adding a wildcard symbol may retrieve word variants: hoc chiet tach - canh tranh tuan ((((hang cong) or (tong cong))) or (hang nong)) dan than cap*.