Perhaps you should try some spelling variations:
nghien thu » nghiem thuc, nghiep thuc, nghien cuu
toc mach » toc sach, hoc mac, tim mach
mach hoc » cach hoc, dich hoc, anh hoc
cong hoc » dong hoc, cong hoa, cong coc
hoc hanh » hoc nhanh, hoc thanh, hoc anh
hanh hoa » thanh hoa, khanh hoa, hang hoa
nhan van » nhan dan, phan van, nha van
nhan va » nhan tai, nhan dan, nhan tao
hoc xa » hoc ma

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc mach hoc tap, nghien thu cong hoc hanh hoa hoc xa hoi va ((nhan van) or (nhan va))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc mach hoc tap, nghien thu cong hoc hanh hoa hoc xa hoi va ((nhan van) OR (nhan va)).
• Adding a wildcard symbol may retrieve word variants: toc mach hoc tap, nghien thu cong hoc hanh hoa hoc xa hoi va ((nhan van) or (nhan va))*.