Perhaps you should try some spelling variations:
nhanh chong » thanh cong, khanh phong
luc nhanh » luc nhan, luc nganh, luc canh
chong hoc » chung hoc, chong doc, thong hoc
sach hoc » cach hoc, sach hoi, mach hoc
cuu dong » cuu cong, cuu tong, cuu long
dong luc » nang luc
tu sach » thu sach, su sach, te sach
hoa » khoa

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 chong hoc ma hoa dan ((gian dan) OR (gian lang))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach hoc tap, nghien cuu dong luc nhanh chong hoc ma hoa dan ((gian dan) OR (gian lang))".
• Adding a wildcard symbol may retrieve word variants: tu sach hoc tap, nghien cuu dong luc nhanh chong hoc ma hoa dan ((gian dan) OR (gian lang))*.