Perhaps you should try some spelling variations:
luc nhanh » luc nhan, luc nganh, luc nhat
khong hoc » khung hoc, thong hoc, khong thuoc
sach hoc » cach hoc, sach hoi, mach hoc
cuu dong » cuu cong, cuu tong, cuu long
nhan van » nhan dan, nhan va, phan van
tu sach » thu sach, su sach, te 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: tu sach hoc tap, nghien cuu dong ((luc nhanh) OR (luc canh)) khong hoc xa hoi va nhan van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach hoc tap, nghien cuu dong ((luc nhanh) OR (luc canh)) khong hoc xa hoi va nhan van".
• Adding a wildcard symbol may retrieve word variants: tu sach hoc tap, nghien cuu dong ((luc nhanh) OR (luc canh)) khong hoc xa hoi va nhan van*.