Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
truong dao » truong dai, truong cao, truong bo
nhung cong » dung cong, thong cong, hang cong
trung dai » truong dai, trung tam, trung cap
hach toan » thanh toan, manh toan
ho chieu » theo chieu, hoc thieu, doi chieu
tam toan » tap toan, tam than, pham toan

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu xanh - hanh ((trung dai) OR (truong dao)) nhung cong ((hach toan) OR (tam toan)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu xanh - hanh ((trung dai) OR (truong dao)) nhung cong ((hach toan) or (tam toan)) cau~".
• Adding a wildcard symbol may retrieve word variants: ho chieu xanh - hanh ((trung dai) OR (truong dao)) nhung cong ((hach toan) or (tam toan)) cau*.