Perhaps you should try some spelling variations:
doc nhanh » hoc nhanh, doc thanh, duoc thanh
chong hoc » chung hoc, chong doc, thong hoc
sach hoc » cach hoc, sach hoi, mach hoc
cuu cong » cua cong, thu cong, cac cong
doc hanh » hoc hanh, duc hanh, doi hanh
nhan van » nhan dan, nhan va, phan van
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 cuu cong ((doc nhanh) OR (doc hanh)) chong hoc xa hoi va nhan van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach hoc tap, nghien cuu cong ((doc nhanh) OR (doc hanh)) chong hoc xa hoi va nhan van".
• Adding a wildcard symbol may retrieve word variants: su sach hoc tap, nghien cuu cong ((doc nhanh) OR (doc hanh)) chong hoc xa hoi va nhan van*.