Perhaps you should try some spelling variations:
nghien cua » nghien cuu, nghiep cua, nghiep vua
hoc thanh » hoc nhanh, hoan thanh, hoc phan
chong hoc » chung hoc, chong doc, thong hoc
sach hoc » cach hoc, sach hoi, mach hoc
doc hanh » hoc hanh, duc hanh, doi hanh
nhan dan » phan dau, gian dan, nhan tai
su sach » so sach, vu sach
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: su sach hoc tap, nghien cua cong ((hoc thanh) or (doc hanh)) chong hoc xa hoi va nhan dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach hoc tap, nghien cua cong ((hoc thanh) OR (doc hanh)) chong hoc xa hoi va nhan dan.
• Adding a wildcard symbol may retrieve word variants: su sach hoc tap, nghien cua cong ((hoc thanh) or (doc hanh)) chong hoc xa hoi va nhan dan*.