Perhaps you should try some spelling variations:
hien xanh » hien hanh, hien nhanh, chieu xanh
truong va » truong dai, truong cao, truong dao
hang cong » dang cong, hang nong, bang cong
cong lang » cong vang, cong luong, cong quang
trung va » trang va, trung ha, trung tam
juan cao » quang cao, toan cao, juan a
quan cau » quang cao, toan cau, quan ha

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 hien xanh - thanh ((trung va) OR (truong va)) hang cong lang ((juan cao) OR (quan cau))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien xanh - thanh ((trung va) OR (truong va)) hang cong lang ((juan cao) or (quan cau))~".
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - thanh ((trung va) OR (truong va)) hang cong lang ((juan cao) or (quan cau))*.