Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hieu manh » chieu xanh, hieu nganh, dieu hanh
tuong cua » truong cua, huong cua, thong cua
toc hieu » toc thieu, doc hieu, hoc thieu
tung cua » trung cua, dung cua, tang cua
cong ban » cong bang, cong san, cong tan
hanh cau » nhanh cau, hang cau, hanh cat
hanh cac » hang cac, hanh cat, nhanh cay

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 hieu manh - thanh ((tung cua) OR (tuong cua)) nhung cong ban ((hanh cau) OR (hanh cac))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc hieu manh - thanh ((tung cua) or (tuong cua)) nhung cong ban ((hanh cau) OR (hanh cac))~".
• Adding a wildcard symbol may retrieve word variants: toc hieu manh - thanh ((tung cua) or (tuong cua)) nhung cong ban ((hanh cau) OR (hanh cac))*.