Perhaps you should try some spelling variations:
nghien cac » nghiep cach, nghien cuu, nghiep cay
cach thuc » anh thuc
cac cong » cua cong
cong coc » cong cuoc, cong cac, cong co
coc hanh » hoc hanh, doc hanh, co hanh
hanh hoa » thanh hoa, khanh hoa, hang hoa
nhan van » nhan dan, nhan va, phan van
cac thu » cac thoi
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.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((cach thuc) OR (cac thu)) tap, nghien cac cong coc hanh hoa hoc xa hoi va nhan van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((cach thuc) OR (cac thu)) tap, nghien cac cong coc hanh hoa hoc xa hoi va nhan van".
• Adding a wildcard symbol may retrieve word variants: hoc ((cach thuc) OR (cac thu)) tap, nghien cac cong coc hanh hoa hoc xa hoi va nhan van*.