Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
trung tran » trung tuan, trung thanh, hung tran
cong quang » luong quang, thong quang, duong quang
hoc thieu » toc thieu, hoc hien
dang cong » dung cong
toan tap » toan ban
phan cau » phan dau, phan cac, phan tu

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 ((trung tran) OR (trung tam)) dang cong quang ((toan tap) or (phan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - thanh ((trung tran) OR (trung tam)) dang cong quang ((toan tap) OR (phan cau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - thanh ((trung tran) OR (trung tam)) dang cong quang ((toan tap) or (phan cau))".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - thanh ((trung tran) OR (trung tam)) dang cong quang ((toan tap) or (phan cau))*.