Perhaps you should try some spelling variations:
nhanh chong » thanh cong, khanh phong
luc nhanh » luc nhan, luc nganh, luc canh
sach hoc » cach hoc, sach hoi, mach hoc
cuu long » cuu cong, cuu tong, cuu nang
long luc » dong luc, long cuc, long lich
hoi tinh » vi tinh, bi tinh, ha tinh
toan ban » van ban
tu sach » thu sach, su sach, te sach

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 long luc nhanh chong ((hoc xa) or (hoc ma)) hoi tinh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach hoc tap, nghien cuu long luc nhanh chong ((hoc xa) OR (hoc ma)) hoi tinh toan ban.
• Adding a wildcard symbol may retrieve word variants: tu sach hoc tap, nghien cuu long luc nhanh chong ((hoc xa) or (hoc ma)) hoi tinh toan ban*.