Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu tinh » trieu tinh, lieu tinh, chau tinh
trung cua » truong cua, trung tuan, trung cap
cua quang » cua quan, qua quang, chat quang
cuong tac » tuong tac, cuong cac, cuong tap
ho chieu » theo chieu, hoc thieu, doi chieu
cong tac » cong ty
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: ho chieu tinh - thanh trung cua quang ((cuong tac) OR (cong tac)) toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu tinh - thanh trung cua quang ((cuong tac) OR (cong tac)) toan cau".
• Adding a wildcard symbol may retrieve word variants: ho chieu tinh - thanh trung cua quang ((cuong tac) OR (cong tac)) toan cau*.