Perhaps you should try some spelling variations:
hang thuoc » khang thuoc, dang thuoc, hanh thuoc
tuong hoc » truong hoc, tuong ho, tuong khoa
duong hoc » dong hoc, dung hoc, duong hoi
kon hinh » doan hinh, khoa hinh, hong hinh
hinh hoc » sinh hoc, tin hoc, benh hoc
thuoc va » thuc va, thuoc ma, thuong va
phan dau » phan tu, hang dau
ca phan » cac phan, cao phan, cap phan
va hoi » xa hoi, va hoc, va hoa
hoi ca » hoi cua, hoi cac, hoi cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: kon hinh hoc tap, nghien cuu ((tuong hoc) or (duong hoc)) ngan hang thuoc va hoi ca phan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: kon hinh hoc tap, nghien cuu ((tuong hoc) OR (duong hoc)) ngan hang thuoc va hoi ca phan dau.
• Adding a wildcard symbol may retrieve word variants: kon hinh hoc tap, nghien cuu ((tuong hoc) or (duong hoc)) ngan hang thuoc va hoi ca phan dau*.