Perhaps you should try some spelling variations:
trong quang » truong quang, trong quan, thong quan
thong quang » thong quan, thong qua, luong quang
chieu xanh » chieu sach, chieu sang, chieu tinh
doi chieu » doc hieu, doi chi, ho chieu
dung cong » dung trong
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu xanh - hanh ((trong quang) OR (thong quang)) dung cong tan toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu xanh - hanh ((trong quang) OR (thong quang)) dung cong tan toan cau".
• Adding a wildcard symbol may retrieve word variants: doi chieu xanh - hanh ((trong quang) OR (thong quang)) dung cong tan toan cau*.