Perhaps you should try some spelling variations:
thanh trung » thanh tung
khanh luong » khanh duong, khanh thuong, khanh phong
luong tham » luong thanh, luong tai, luong thi
hieu manh » chieu xanh, hieu nganh, dieu hanh
hieu lang » chieu sang, hieu quang, nhieu tang
trung van » truong van, trong van, trung va
van khanh » van thanh, van hanh, van anh
tham phan » than phan, thai phan, thanh phan

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 manh) or (hieu lang)) - thanh trung van khanh luong tham phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu manh) OR (hieu lang)) - thanh trung van khanh luong tham phan tu.
• Adding a wildcard symbol may retrieve word variants: doc ((hieu manh) or (hieu lang)) - thanh trung van khanh luong tham phan tu*.