Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hieu lang » chieu sang, hieu quang, nhieu tang
thang cua » thong cua, hang cua, than cua
cong manh » cong danh, duong manh, cong thanh
hoi hieu » hoi phieu, hoi tieu, moi hieu
tang cua » mang cua, hang cua, tang luan
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: hoi hieu lang - hanh ((thang cua) or (tang cua)) nhung cong manh ((toan tap) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoi hieu lang - hanh ((thang cua) OR (tang cua)) nhung cong manh ((toan tap) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: hoi hieu lang - hanh ((thang cua) or (tang cua)) nhung cong manh ((toan tap) or (toan ban))*.