Perhaps you should try some spelling variations:
duong benh » duong binh, giuong benh, duong manh
hoc thieu » hoc hien
cong thuc » cong tac
van duong » van dong, van dung, van phong
benh phan » benh nhan, benh phau, kenh phan
thuc van » thuc vat, thuc dan, thuc va
phan dau » phan tu, hang dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc thieu) or (toc thieu)) tinh - thanh cong thuc van duong benh phan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (toc thieu)) tinh - thanh cong thuc van duong benh phan dau.
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) or (toc thieu)) tinh - thanh cong thuc van duong benh phan dau*.