Perhaps you should try some spelling variations:
cach thoi » cac thoi, cach thuc, cach noi
thoi tap » toi tap, hoc tap, thoi dai
khoa hoc » hoa hoc
hop benh » hoc benh, hap benh, hoa benh
nhan van » nhan dan, nhan va, phan van
vu cach » va cach, ve cach, vu bach
mon hoc » toan hoc, dong hoc
hoc xa » hoc ma
xa hop » xa hoi, va hop, 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 cach thoi tap, nghien cuu ((co hoc) or (mon hoc)) toan khoa hoc xa hop benh nhan van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu cach thoi tap, nghien cuu ((co hoc) OR (mon hoc)) toan khoa hoc xa hop benh nhan van.
• Adding a wildcard symbol may retrieve word variants: vu cach thoi tap, nghien cuu ((co hoc) or (mon hoc)) toan khoa hoc xa hop benh nhan van*.