Perhaps you should try some spelling variations:
hanh trang » thanh trung, canh tranh, hanh trinh
nhung cong » dung cong, thong cong, nhung don
hieu cach » chieu sach, hieu ca, biet cach
trang cua » tranh cua, tang cua, trung cua
hang cong » dang cong, hang nong, bang cong
hieu cac » hieu luc, hieu va, hieu van
van khan » van khanh, van khang, van phan
khan cap » khan ap, than cap, khoan cam

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 cach) OR (hieu cac)) - hanh trang cua ((nhung cong) OR (hang cong)) van khan cap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu cach) OR (hieu cac)) - hanh trang cua ((nhung cong) or (hang cong)) van khan cap~".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu cach) OR (hieu cac)) - hanh trang cua ((nhung cong) or (hang cong)) van khan cap*.