Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu sach, chieu xanh, hieu lang
phuong ban » phuong bang, phuong lan, phuong bac
doi chieu » doc hieu, doi chi, ho chieu
trung cao » truong cao, trung cap, trung co
cao bang » cao dang, cao tang, cao nang
ban toan » bai toan, ban than, van toan
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: doi chieu sang - thanh trung cao bang phuong ban toan cau~.
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - thanh trung cao bang phuong ban toan cau*.