Perhaps you should try some spelling variations:
truong cao » truong dai
cong quang » luong quang, thong quang, duong quang
hien xanh » hien hanh, hien nhanh, chieu xanh
truong ca » truong va, trong ca, truong dai
dung cong » dung trong
tran chau » tranh chap, tran huu
tran cau » toan cau, ran cau, tra cau

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien xanh - thanh ((truong cao) or (truong ca)) dung cong quang ((tran cau) OR (tran chau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - thanh ((truong cao) OR (truong ca)) dung cong quang ((tran cau) OR (tran chau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien xanh - thanh ((truong cao) or (truong ca)) dung cong quang ((tran cau) OR (tran chau))".
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - thanh ((truong cao) or (truong ca)) dung cong quang ((tran cau) OR (tran chau))*.