Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
trung tuan » trung thanh, trung tam, tran tuan
hoc thieu » toc thieu, hoc hien
trung tan » trung tran, trung tang, truong tan
dung cong » dung trong
cong van » cong vang, cong san, song van
tuan cau » quan cau, tuan cu, thuan cam
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 thieu xanh - thanh ((trung tan) OR (trung tuan)) dung cong van ((tuan cau) OR (toan cau))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - thanh ((trung tan) or (trung tuan)) dung cong van ((tuan cau) OR (toan cau))~".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - thanh ((trung tan) or (trung tuan)) dung cong van ((tuan cau) OR (toan cau))*.