Perhaps you should try some spelling variations:
trinh quang » trinh quan, tranh quang, trinh dung
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
hung cong » nhung cong, hung cuong, phung cong
cong san » cong tac
san phan » san pham, van phan, sat phan
phan cau » phan dau, phan cac, phan tu

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