Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu xanh » chieu sach, chieu sang, chieu tinh
hieu lang » chieu sang, hieu quang, nhieu tang
trung cao » truong cao, trung cap, trung co
cao hang » cao dang, cao tang, cao bang
nong san » dong san, nong dan, trong san
cong san » cong tac
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: theo ((hieu lang) or (chieu xanh)) - thanh trung cao hang ((nong san) or (cong san)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((hieu lang) OR (chieu xanh)) - thanh trung cao hang ((nong san) OR (cong san)) toan cau.
• Adding a wildcard symbol may retrieve word variants: theo ((hieu lang) or (chieu xanh)) - thanh trung cao hang ((nong san) or (cong san)) toan cau*.