Perhaps you should try some spelling variations:
hoc khanh » hoc nhanh, hoc thanh, hoc hanh
khanh hoa » thanh hoa, hang hoa
cac thuc » cach thuc, cac thu, can thuc
thuc tap » tuc tap, thuc thai, thuc vat
cuu cong » cua cong, thu cong, cac cong
cong hoc » dong hoc, cong hoa, cong coc
hoc benh » soc benh, hoc kinh, so benh
nhan dan » phan dau, gian dan
nhan tai » hang tai, van tai, toan tai
ma hoc » va hoc, ma hoa, mo hoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu cac thuc tap, nghien cuu cong hoc khanh hoa hoc ma hoc benh ((nhan dan) or (nhan tai))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cac thuc tap, nghien cuu cong hoc khanh hoa hoc ma hoc benh ((nhan dan) OR (nhan tai)).
• Adding a wildcard symbol may retrieve word variants: tu cac thuc tap, nghien cuu cong hoc khanh hoa hoc ma hoc benh ((nhan dan) or (nhan tai))*.