Perhaps you should try some spelling variations:
khong cong » thong cong, khong cang, chong cong
tieu sach » chieu sach, dien sach, te sach
tang luan » dung luan
cong manh » cong danh, duong manh, cong thanh
manh toan » thanh toan, anh tuan, tinh toan
tang cua » mang cua, hang cua, thong cua
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: theo tieu sach - hanh ((tang cua) or (tang luan)) khong cong manh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu sach - hanh ((tang cua) OR (tang luan)) khong cong manh toan cau.
• Adding a wildcard symbol may retrieve word variants: theo tieu sach - hanh ((tang cua) or (tang luan)) khong cong manh toan cau*.