Perhaps you should try some spelling variations:
thieu manh » hieu manh, tien manh, trieu minh
hanh tranh » canh tranh, hanh trinh, hanh trang
thong cong » trong cong, tong cong, thong thong
tranh cua » doanh cua, manh cua
cua thong » cua thuong, cua khong, cua tong
cong sach » ong sach, song sach, duong sach
trinh cau » trinh chat, trinh chao, trinh tu
chat » nhat, phat

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc thieu manh - hanh tranh cua thong cong sach ((trinh cau) or (tinh chat))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc thieu manh - hanh tranh cua thong cong sach ((trinh cau) OR (tinh chat)).
• Adding a wildcard symbol may retrieve word variants: toc thieu manh - hanh tranh cua thong cong sach ((trinh cau) or (tinh chat))*.