Perhaps you should try some spelling variations:
dung quang » dang quang, dung quan, luong quang
hieu lang » chieu sang, hieu quang, nhieu tang
hung qua » dung qua, hung quang, nhung quy
cong san » cong tac
san phan » san pham, van phan, sat phan
phan cac » nhan cach, phan dau, phan lap
ho hieu » ho chieu, hoi hieu, nho hieu

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 lang - thanh ((hung qua) or (dung quang)) trong cong san phan cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - thanh ((hung qua) OR (dung quang)) trong cong san phan cac.
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - thanh ((hung qua) or (dung quang)) trong cong san phan cac*.