Perhaps you should try some spelling variations:
nghien thu » nghiem thuc, nghiep thuc, nghien cuu
toc cach » hoc cach, toc sach, truoc cach
cong hoc » dong hoc, cong hoa, cong coc
hoc hang » hoc hanh, hoc bang, hoc tang
hang hoa » hang khoa, thanh hoa, hang va
nhan van » nhan dan, nhan va, phan van
va nhan » van nhan, ca nhan, va phan
hoc xa » hoc ma

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc cach) OR (cuoc cach)) thuc vat, nghien thu cong hoc hang hoa hoc xa hoi va nhan van~.
• Adding a wildcard symbol may retrieve word variants: ((toc cach) or (cuoc cach)) thuc vat, nghien thu cong hoc hang hoa hoc xa hoi va nhan van*.