Perhaps you should try some spelling variations:
thanh trung » thanh tung
trung thanh » truong thanh
dung thuong » dung trong, hang thuong, cong thuong
dung tuong » dung truong, dung trong, dung luong
hieu lang » chieu sang, hieu quang, nhieu tang
doi hieu » doi chieu, doc hieu, doi hien
dan phan » doan phan, dan chan, van phan
phan cau » phan dau, phan cac, phan tu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: doi hieu lang - thanh trung thanh ((dung tuong) or (dung thuong)) dan phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi hieu lang - thanh trung thanh ((dung tuong) OR (dung thuong)) dan phan cau.
• Adding a wildcard symbol may retrieve word variants: doi hieu lang - thanh trung thanh ((dung tuong) or (dung thuong)) dan phan cau*.