Perhaps you should try some spelling variations:
thieu manh » hieu manh, tien manh, trieu minh
hanh tranh » canh tranh, hanh trinh, hanh trang
tong duong » tuong duong, thong duong, dong duong
duong sach » duong manh
trinh chat » trinh luat, trinh phan
tranh cua » doanh cua, manh cua
trinh han » trinh quan
cua tong » cua cong, cua dong, cua nong

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: toc thieu manh - hanh tranh cua tong duong sach ((((trinh chat) OR (trinh han))) OR (tinh chat))~.
• Adding a wildcard symbol may retrieve word variants: toc thieu manh - hanh tranh cua tong duong sach ((((trinh chat) or (trinh han))) or (tinh chat))*.