Perhaps you should try some spelling variations:
trung thanh » truong thanh
chieu xanh » chieu sach, chieu sang, chieu tinh
dung cong » dung trong
ho chieu » theo chieu, hoc thieu, doi chieu
cong tap » cuong tap, cong tac, cong tan
tap toan » tap doan, tap quan, bai toan
toan ban » van ban

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 xanh - thanh ((trung thanh) or (trung tam)) dung cong tap toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu xanh - thanh ((trung thanh) OR (trung tam)) dung cong tap toan ban.
• Adding a wildcard symbol may retrieve word variants: ho chieu xanh - thanh ((trung thanh) or (trung tam)) dung cong tap toan ban*.