Perhaps you should try some spelling variations:
thanh trung » thanh tung
trong bang » trong ban, trong dang, trong tang
hieu lang » chieu sang, hieu quang, nhieu tang
bang phap » ban phap, nang phap, bang php
doc hieu » toc thieu, hoc thieu, hoc hien
tam dung » tam duong, tac dung, tan dung
phap cau » phan cau, pha cau, phap ca

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 - thanh trung tam dung trong bang phap cau~.
• Adding a wildcard symbol may retrieve word variants: doc hieu lang - thanh trung tam dung trong bang phap cau*.