Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
chieu sang » chieu sach, chieu xanh, nhieu tang
nhung cong » dung cong, thong cong, hang cong
hieu lang » hieu quang, nhieu tang, hieu van
tranh va » tranh van, trang va, trinh va
cong cao » cong cau, cong cac, cong co
chat tap » chat thai, chat va, han tap
chat tai » chat thai, cao tai, khau 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: ho ((chieu sang) OR (hieu lang)) - hanh tranh va nhung cong cao ((chat tap) OR (chat tai))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sang) OR (hieu lang)) - hanh tranh va nhung cong cao ((chat tap) or (chat tai))~".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sang) OR (hieu lang)) - hanh tranh va nhung cong cao ((chat tap) or (chat tai))*.