Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hoc chieu » hoc thieu, ho chieu, hoc hien
dung cong » dung trong
cong san » cong tac
toan cau » toan cao, toan ban, toan tap
manh va » anh va, minh va, lanh va
hanh va » hang va, hanh vi

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu xanh - hanh ((manh va) OR (hanh va)) dung cong san ((toan cau) OR (van ban))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu xanh - hanh ((manh va) OR (hanh va)) dung cong san ((toan cau) or (van ban))~".
• Adding a wildcard symbol may retrieve word variants: hoc chieu xanh - hanh ((manh va) OR (hanh va)) dung cong san ((toan cau) or (van ban))*.