Perhaps you should try some spelling variations:
thanh phan » thanh pho, thanh san, thanh toan
hanh trung » thanh trung, hanh trang, manh trung
hieu lang » chieu sang, hieu quang, nhieu tang
dung cong » dung trong
tan thanh » tran thanh, tang thanh, toan thanh
trung va » truong va, trang va, trung ha
cong tan » cong tac, cong san, cong thanh
hieu ca » hieu cac, hieu cua, hieu va
va dung » van dung, va duong, vat dung

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: toc ((hieu ca) OR (hieu lang)) - hanh trung va dung cong tan thanh phan~.
• Adding a wildcard symbol may retrieve word variants: toc ((hieu ca) or (hieu lang)) - hanh trung va dung cong tan thanh phan*.