Perhaps you should try some spelling variations:
truong cong » trong cong, truong dong, truong long
thanh trung » thanh tung
cap truong » cac truong, lap truong, cao truong
trung cap » truong cao, trung tam
khoan cam » khoa cam, khoan va, thuan cam
doc hieu » toc thieu, hoc thieu
cong san » cong tac
phan cam » phan cac, phan cau, phan cang

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: ((doc hieu) OR (hoc hien)) tinh - thanh trung cap truong cong san ((khoan cam) OR (phan cam))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doc hieu) OR (hoc hien)) tinh - thanh trung cap truong cong san ((khoan cam) or (phan cam))~".
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) OR (hoc hien)) tinh - thanh trung cap truong cong san ((khoan cam) or (phan cam))*.