Perhaps you should try some spelling variations:
truong cua » truong ca, truong quan, truong cao
nhung cong » dung cong, thong cong, hang cong
hieu lang » chieu sang, hieu quang, nhieu tang
trung cap » truong cao, trung tam
doc hieu » toc thieu, hoc thieu, hoc hien
cong dan » cong san, cong tan, huong dan
toan cau » toan ban, toan tap, toan tai
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: doc hieu lang - hanh ((trung cap) or (truong cua)) nhung cong dan ((toan cau) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu lang - hanh ((trung cap) OR (truong cua)) nhung cong dan ((toan cau) OR (toan cao)).
• Adding a wildcard symbol may retrieve word variants: doc hieu lang - hanh ((trung cap) or (truong cua)) nhung cong dan ((toan cau) or (toan cao))*.