Perhaps you should try some spelling variations:
cong huong » cong thuong, cong luong, dong huong
hieu manh » chieu xanh, hieu nganh, dieu hanh
cong hung » cong chung, cong dung, cong thuong
hoc hieu » hoc thieu, hoc hien, doc hieu
hanh san » thanh san, khach san, thanh son
chan tap » phan tap, chan ta, toan tap
san cua » sang cua, ban cua, dan cua
han tap » han tai, toan tap, nhan tai

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: hoc hieu manh - hanh san cua ((cong huong) OR (cong hung)) dan ((chan tap) OR (han tap))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hieu manh - hanh san cua ((cong huong) or (cong hung)) dan ((chan tap) OR (han tap))~".
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - hanh san cua ((cong huong) or (cong hung)) dan ((chan tap) OR (han tap))*.