Perhaps you should try some spelling variations:
chuong quang » thuong quang, luong quang, cuong quan
phuong quang » phung quang, thuong quang, phuong hoang
thieu xanh » chieu xanh, hieu manh, thien anh
hoc thieu » toc thieu, hoc hien
dung cong » dung trong
cong tac » cong ty
toan cau » toan cao, toan ban, toan tai
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thieu xanh - thanh ((chuong quang) or (phuong quang)) dung cong tac ((toan cau) OR (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - thanh ((chuong quang) OR (phuong quang)) dung cong tac ((toan cau) OR (toan tap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - thanh ((chuong quang) or (phuong quang)) dung cong tac ((toan cau) OR (toan tap))".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - thanh ((chuong quang) or (phuong quang)) dung cong tac ((toan cau) OR (toan tap))*.