Perhaps you should try some spelling variations:
nghien cac » nghiep cach, nghien cuu, nghiep cay
cach thuc » anh thuc, cac thu
thuc thai » thuc pham, toc thai, thuc thuc
hang khoa » dung khoa
toc cach » hoc cach, toc sach, truoc cach
cac cong » cua cong
cong hoc » dong hoc, cong hoa, cong coc
hoc hang » hoc hanh, hoc bang, hoc tang
khoa hoc » hoa hoc
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 cach thuc thai, nghien cac cong hoc hang khoa hoc xa hoi va ((nhan van) or (nhan va))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc cach thuc thai, nghien cac cong hoc hang khoa hoc xa hoi va ((nhan van) OR (nhan va)).
• Adding a wildcard symbol may retrieve word variants: toc cach thuc thai, nghien cac cong hoc hang khoa hoc xa hoi va ((nhan van) or (nhan va))*.