Perhaps you should try some spelling variations:
phuong cong » phuong dong, phong cong, phung cong
truong cua » truong ca, truong quan, truong cao
hieu tinh » chieu tinh, lieu tinh, kieu tinh
trung cua » trung tuan, trung cap, dung cua
doc hieu » toc thieu, hoc thieu, hoc hien
cong dan » cong san, cong tan, huong dan
dan chan » dan gian, dan ca, van chat
chan cap » khan cap, than cap, cao cap

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 tinh - thanh ((trung cua) or (truong cua)) phuong cong dan chan cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu tinh - thanh ((trung cua) OR (truong cua)) phuong cong dan chan cap.
• Adding a wildcard symbol may retrieve word variants: doc hieu tinh - thanh ((trung cua) or (truong cua)) phuong cong dan chan cap*.