Perhaps you should try some spelling variations:
hieu quang » thieu quang, hieu quan, hieu qua
hanh trang » thanh trung, canh tranh, hanh trinh
nhung cong » dung cong, thong cong, hang cong
hieu lang » chieu sang, nhieu tang, hieu van
trang cua » tranh cua, tang cua, trung cua
cua nhung » va nhung
tan chan » dan chan, ban chan, tam chan
can chan » dan chan, cam chan, ban chan

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) or (hieu quang)) - hanh trang cua nhung cong ((tan chan) OR (can chan)) cho~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoi ((hieu lang) OR (hieu quang)) - hanh trang cua nhung cong ((tan chan) OR (can chan)) cho.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoi ((hieu lang) or (hieu quang)) - hanh trang cua nhung cong ((tan chan) OR (can chan)) cho".
• Adding a wildcard symbol may retrieve word variants: hoi ((hieu lang) or (hieu quang)) - hanh trang cua nhung cong ((tan chan) OR (can chan)) cho*.