Perhaps you should try some spelling variations:
hieu quang » thieu quang, hieu quan, hieu qua
nhieu tang » chieu sang, hieu lang, nhiet nang
nhanh tinh » nhanh thanh, hanh trinh, nhan sinh
chat phong » chau phong, chat chong, chat luong
phong cong » phong chong, thong cong, chong cong
trinh quan » tinh quang, trinh luat, trinh han
hanh tinh » hanh trinh, thanh tinh, canh tinh
quan dau » quan cau, qua dau, quan dac

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 (nhieu tang)) - ((hanh tinh) OR (nhanh tinh)) chat phong cong trinh quan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu quang) OR (nhieu tang)) - ((hanh tinh) OR (nhanh tinh)) chat phong cong trinh quan dau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu quang) or (nhieu tang)) - ((hanh tinh) OR (nhanh tinh)) chat phong cong trinh quan dau".
• Adding a wildcard symbol may retrieve word variants: ho ((hieu quang) or (nhieu tang)) - ((hanh tinh) OR (nhanh tinh)) chat phong cong trinh quan dau*.