Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
nhung cong » thong cong, hang cong, nhung don
hoc chieu » hoc thieu, ho chieu, hoc hien
dung cong » dung trong
trung va » truong va, trang va, trung tam
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.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc chieu xanh - hanh ((trung va) or (trung ha)) ((nhung cong) or (dung cong)) tinh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu xanh - hanh ((trung va) OR (trung ha)) ((nhung cong) OR (dung cong)) tinh toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc chieu xanh - hanh ((trung va) or (trung ha)) ((nhung cong) or (dung cong)) tinh toan cau*.