Perhaps you should try some spelling variations:
nghien cac » nghiep cach, nghien cuu, nghiep cay
nhanh hung » thanh hung, nhanh hong, nhanh chuong
tac nhanh » tac nhan, tac thanh, tai nhanh
toc sach » hoc sach, doc sach, thuoc sach
sach hoc » cach hoc, sach hoi, mach hoc
cac cong » cua cong
cong tac » cong ty
hung hoc » chung hoc, khung hoc, nhung hoc
nhan van » nhan va, phan van, nha van
nhan dan » phan dau, gian dan, nhan tai
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 sach hoc tap, nghien cac cong tac nhanh hung hoc xa hoi va ((nhan van) or (nhan dan))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach hoc tap, nghien cac cong tac nhanh hung hoc xa hoi va ((nhan van) OR (nhan dan)).
• Adding a wildcard symbol may retrieve word variants: toc sach hoc tap, nghien cac cong tac nhanh hung hoc xa hoi va ((nhan van) or (nhan dan))*.