Perhaps you should try some spelling variations:
dung quang » dang quang, dung quan, luong quang
theo hieu » theo chieu, theo tieu, thien hieu
hieu lang » chieu sang, hieu quang, nhieu tang
hung qua » dung qua, hung quang, nhung quy
cong sat » cong suat, cong san, cong hat
sat phan » sat nhan, vat phan, xuat phan
phan dau » phan tu, hang dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo hieu lang - thanh ((hung qua) or (dung quang)) trong cong sat phan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo hieu lang - thanh ((hung qua) OR (dung quang)) trong cong sat phan dau.
• Adding a wildcard symbol may retrieve word variants: theo hieu lang - thanh ((hung qua) or (dung quang)) trong cong sat phan dau*.