Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hoc chieu » hoc thieu, ho chieu, hoc hien
truong va » truong dai, truong cao, truong dao
dung cong » dung trong
cong tinh » cong trinh, cong vinh, long tinh
trung ha » trung hoc, trung tam, trung cap
toan cau » toan cao, toan ban, toan tap

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 - manh ((truong va) OR (trung ha)) dung cong tinh toan cau~.
• Adding a wildcard symbol may retrieve word variants: hoc chieu xanh - manh ((truong va) or (trung ha)) dung cong tinh toan cau*.