Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
nhung cong » dung cong, thong cong, hang cong
cong quang » luong quang, thong quang, duong quang
hoc thieu » toc thieu, hoc hien
trung va » truong va, trang va, trung tam
trung ha » trung hoc, trung tam, trung cap
quan cua » quan luan, ban cua, gian cua
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 thieu xanh - hanh ((trung va) or (trung ha)) nhung cong quang ((quan cua) or (toan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - hanh ((trung va) OR (trung ha)) nhung cong quang ((quan cua) OR (toan cau)).
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - hanh ((trung va) or (trung ha)) nhung cong quang ((quan cua) or (toan cau))*.