Perhaps you should try some spelling variations:
hieu quang » thieu quang, hieu quan, hieu qua
thanh tung » thanh cong
nhung cong » dung cong, thong cong, hang cong
ban nhan » ban than, van nhan, ban thanh
van phan » van phong, van thanh, luan phan
ho hieu » ho chieu, hoi hieu, nho hieu
tung va » trung va, tuong va, dung va

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho hieu quang - thanh tung va nhung cong ((((benh nhan) or (ban nhan))) or (van phan)) cach~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu quang - thanh tung va nhung cong ((((benh nhan) OR (ban nhan))) OR (van phan)) cach.
• Adding a wildcard symbol may retrieve word variants: ho hieu quang - thanh tung va nhung cong ((((benh nhan) or (ban nhan))) or (van phan)) cach*.