Perhaps you should try some spelling variations:
nghien cac » nghiep cach, nghien cuu, nghiep cay
hoa nhanh » hoc nhanh, hoa thanh, hoa nhan
hoa khanh » hoa thanh, hoa phan, hoa hinh
sach dao » lanh dao
cac dong » cac duong, cac cong, cac dang
khoa hoc » hoa hoc
nhan dan » phan dau, gian dan, nhan tai
vu sach » vu bach, su sach, vu khach
dao tap » dao tao, dao tay, dao gap
hoc xa » hoc ma
hoi ca » hoi cua, hoi cac, hoi cau

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach dao tap, nghien cac dong ((hoa nhanh) OR (hoa khanh)) khoa hoc xa hoi ca nhan dan~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach dao tap, nghien cac dong ((hoa nhanh) OR (hoa khanh)) khoa hoc xa hoi ca nhan dan".
• Adding a wildcard symbol may retrieve word variants: vu sach dao tap, nghien cac dong ((hoa nhanh) OR (hoa khanh)) khoa hoc xa hoi ca nhan dan*.