Perhaps you should try some spelling variations:
soc khanh » soc khach, ngoc khanh, quoc khanh
khanh hoa » thanh hoa, hang hoa
sach hoc » cach hoc, sach hoi, mach hoc
cuu cong » cua cong, thu cong, cac cong
cong soc » cong so, cong suc, cong coc
nhan van » nhan va, phan van, nha van
nhan dan » phan dau, gian dan, nhan tai
te sach » toc sach
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: te sach hoc tap, nghien cuu cong soc khanh hoa hoc xa hoi va ((nhan van) or (nhan dan))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach hoc tap, nghien cuu cong soc khanh hoa hoc xa hoi va ((nhan van) OR (nhan dan)).
• Adding a wildcard symbol may retrieve word variants: te sach hoc tap, nghien cuu cong soc khanh hoa hoc xa hoi va ((nhan van) or (nhan dan))*.