Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
truong dao » truong dai, truong cao, truong bo
cuong cong » cong cong, luong cong, duong cong
trung dai » truong dai, trung tam, trung cap
ho chieu » theo chieu, hoc thieu, doi chieu
cong ban » cong bang, cong san, cong tan
khan cap » khan ap, than cap, khoan cam
han ap » han tap, khan ap, dan ap

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 tinh - manh ((trung dai) OR (truong dao)) cuong cong ban ((khan cap) OR (han ap))~.
• Adding a wildcard symbol may retrieve word variants: ho chieu tinh - manh ((trung dai) or (truong dao)) cuong cong ban ((khan cap) or (han ap))*.