Perhaps you should try some spelling variations:
hieu quang » thieu quang, hieu quan, diep quang
hanh tran » hanh trang, thanh tran, thanh trang
hanh tram » hanh tam, hanh trang, thanh tran
bang cong » dang cong, bang song, hang cong
san nhanh » san thanh, nhan nhanh, ban hanh
nhanh cau » nhanh cay, thanh chau, nhanh ha
van bang » van ban, van nang, von bang
cong san » cong tac

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((hieu quang) or (hieu qua)) - ((hanh tran) OR (hanh tram)) van bang cong san nhanh cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu quang) OR (hieu qua)) - ((hanh tran) OR (hanh tram)) van bang cong san nhanh cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu quang) or (hieu qua)) - ((hanh tran) OR (hanh tram)) van bang cong san nhanh cau".
• Adding a wildcard symbol may retrieve word variants: ho ((hieu quang) or (hieu qua)) - ((hanh tran) OR (hanh tram)) van bang cong san nhanh cau*.