Perhaps you should try some spelling variations:
nghien cua » nghien cuu, nghiep cua, nghiep vua
cach thuc » anh thuc, cac thu
hoc cach » hoc cac, hoc sach, cuoc cach
cong coc » cong cuoc, cong cac, cong co
coc hang » hoc hang, oc hang, moc hoang
nhan dan » gian dan, nhan tai
phan dau » phan tu, hang dau
va hoc » van hoc
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: hoc cach thuc vat, nghien cua cong coc hang va hoc xa hoi va ((nhan dan) or (phan dau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc cach thuc vat, nghien cua cong coc hang va hoc xa hoi va ((nhan dan) OR (phan dau)).
• Adding a wildcard symbol may retrieve word variants: hoc cach thuc vat, nghien cua cong coc hang va hoc xa hoi va ((nhan dan) or (phan dau))*.