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