Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
dung quang » dang quang, dung quan, luong quang
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

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chieu sach - thanh ((hung qua) OR (dung quang)) trong cong san phan cac~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu sach - thanh ((hung qua) OR (dung quang)) trong cong san phan cac".
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - thanh ((hung qua) OR (dung quang)) trong cong san phan cac*.