Perhaps you should try some spelling variations:
nhanh chong » thanh cong, khanh phong
nghien cac » nghiep cach, nghien cuu, nghiep cay
hoa nhanh » hoc nhanh, hoa thanh, hoa khanh
chong hoc » chung hoc, chong doc, thong hoc
sach hoc » cach hoc, sach hoi, mach hoc
cac cong » cua cong
cong hoa » dong hoa, dong hoc, hang hoa
nhan dan » phan dau, gian dan, nhan tai
te sach » toc sach
nhan va » nhan tai, nhan tao, phan van
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 cac cong hoa nhanh chong hoc xa hoi va ((nhan dan) or (nhan va))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach hoc tap, nghien cac cong hoa nhanh chong hoc xa hoi va ((nhan dan) OR (nhan va)).
• Adding a wildcard symbol may retrieve word variants: te sach hoc tap, nghien cac cong hoa nhanh chong hoc xa hoi va ((nhan dan) or (nhan va))*.