Perhaps you should try some spelling variations:
chieu sach » chinh sach, chieu sang, chieu xanh
hanh tranh » canh tranh, hanh trang, lanh tranh
hanh trinh » canh tranh, hanh chinh
trung cong » truong cong, trong cong, trung uong
cua trung » cua truong, xuan trung, cua nhung
cong van » cong vang, cong san, song van
van toan » van tuan, van tan, van thanh
toan cao » toan ban, toan tap

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

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