Perhaps you should try some spelling variations:
chieu sach » chiet tach, chieu sang, chieu xanh
hanh tranh » hanh trinh, hanh trang, lanh tranh
tong cong » trong cong, cong cong, dung cong
cua tong » cua cong, cua dong, cua nong
cong van » cong vang, cong san, song van
van tan » van tuan, van ban, van tai
tan tap » toan tap, han tap, tan tat

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chieu sach) or (chinh sach)) - ((hanh tranh) OR (canh tranh)) cua tong cong van tan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sach) OR (chinh sach)) - ((hanh tranh) OR (canh tranh)) cua tong cong van tan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu sach) or (chinh sach)) - ((hanh tranh) OR (canh tranh)) cua tong cong van tan tap".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sach) or (chinh sach)) - ((hanh tranh) OR (canh tranh)) cua tong cong van tan tap*.