Perhaps you should try some spelling variations:
thuong cong » thong cong, thuong con, thuong dong
cua thuong » cua truong, cua phuong, ca thuong
hieu lang » chieu sang, hieu quang, nhieu tang
hanh dinh » thanh dinh, hinh dinh, hanh tinh
cong manh » cong danh, duong manh, cong thanh
manh toan » thanh toan, anh tuan, tinh toan
dinh cua » dinh cuu, sinh cua, dinh cu
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((hieu lang) or (lieu va)) - hanh dinh cua thuong cong manh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((hieu lang) OR (lieu va)) - hanh dinh cua thuong cong manh toan ban*.