Perhaps you should try some spelling variations:
hieu quang » thieu quang, hieu quan, diep quang
nhan nhanh » nhanh thanh, nhat hanh
hanh tran » hanh trang, thanh tran, hanh tram
bang song » nang song
san nhanh » san thanh, ban hanh, ban thanh
tran van » luan van
van bang » van ban, van nang, von bang

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