Perhaps you should try some spelling variations:
chieu sach » chinh sach, chieu sang, chieu xanh
trinh khai » trinh kham, trinh han, trinh tai
tranh kha » tranh ha, tranh chap, trinh kham
dang cong » dung cong
cong manh » cong danh, duong manh, cong thanh
manh toan » thanh toan, anh tuan, tinh toan
toan ban » van ban

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

• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (chiet tach)) - canh ((tranh kha) OR (trinh khai)) dang cong manh toan ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sach) OR (chiet tach)) - canh ((tranh kha) or (trinh khai)) dang cong manh toan ban~".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) OR (chiet tach)) - canh ((tranh kha) or (trinh khai)) dang cong manh toan ban*.