Perhaps you should try some spelling variations:
chieu sach » chinh sach, chieu sang, chieu xanh
nhung cong » dung cong, thong cong, hang cong
cong manh » cong danh, duong manh, cong thanh
manh toan » thanh toan, anh tuan, tinh toan
chinh ca » chinh va, chinh tai, chinh cho
chinh ta » chinh tai, chinh va, chinh tri
toan cau » 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: ho ((chieu sach) or (chiet tach)) - hanh ((chinh ca) or (chinh ta)) nhung cong manh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sach) OR (chiet tach)) - hanh ((chinh ca) OR (chinh ta)) nhung cong manh toan cau.
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sach) or (chiet tach)) - hanh ((chinh ca) or (chinh ta)) nhung cong manh toan cau*.