Perhaps you should try some spelling variations:
khoa than » khoa luan, hoa thai, hoa tan
cac thanh » bac thanh, cach nhanh, ban thanh
thanh hoa » thanh pho
khoa tap » khoa tai, hoc tap, khoa ma
cuu cong » cua cong, thu cong, cac cong
cong cac » cuong cac, cong tac, cong cau
hoc benh » soc benh, hoc kinh, so benh
nhan va » nhan tai, nhan dan, nhan tao
hoc xa » hoc ma
xa hoc » xa hoi, va hoc, xa hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu bach ((khoa tap) OR (khoa than)), nghien cuu cong cac thanh hoa hoc xa hoc benh nhan va~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu bach ((khoa tap) OR (khoa than)), nghien cuu cong cac thanh hoa hoc xa hoc benh nhan va".
• Adding a wildcard symbol may retrieve word variants: vu bach ((khoa tap) OR (khoa than)), nghien cuu cong cac thanh hoa hoc xa hoc benh nhan va*.