Perhaps you should try some spelling variations:
kkhoa than » hoa than
nhan kkhoa » nhan khoa, nha khoa, nhan hoa
dien thuc » kien thuc, den thuc, diem thuc
thuc hang » thuc hanh, thu hang, phuc hang
hang khoa » dung khoa
khoa khoa » hoa khoa, khuan khoa, khoa hoc
khoa than » khoa luan, hoa thai, hoa tan
tam thuc » tham thuc, am thuc, nam thuc
thuc anh » thuc hanh, thuy anh, thu anh
anh nhan » danh nhan, doanh nhan, thanh nhan
vu mach » vi mach, vu bach, vu manh
can tam » canh tam, van tam, can tac
tu can » tu ban, tu cac, thu canh

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( vu mach dien thuc hang khoa khoa than ) or ( tu can tam thuc anh nhan kkhoa than ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( vu mach dien thuc hang khoa khoa than ) OR ( tu can tam thuc anh nhan kkhoa than )).
• Adding a wildcard symbol may retrieve word variants: (( vu mach dien thuc hang khoa khoa than ) or ( tu can tam thuc anh nhan kkhoa than ))*.