Perhaps you should try some spelling variations:
thanh tung » thanh cong
cua truong » cua trung, xuan truong, cac truong
hieu lang » chieu sang, hieu quang, nhieu tang
tung cua » trung cua, tuong cua, dung cua
dong tac » cong tac, dong bac, dong tam
dong tai » dung tai, luong tai, cong tac
toan cau » toan cao, toan ban, toan tap
ho hieu » ho chieu, hoi hieu, nho hieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho hieu lang - thanh tung cua truong ((dong tac) OR (dong tai)) toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho hieu lang - thanh tung cua truong ((dong tac) OR (dong tai)) toan cau".
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - thanh tung cua truong ((dong tac) OR (dong tai)) toan cau*.