Perhaps you should try some spelling variations:
luc nhanh » luc nhan, luc nganh, luc nhat
chong hoc » chung hoc, chong doc, thong hoc
danh gian » dan gian, danh gia, danh giao
mach hoc » cach hoc, dich hoc, anh hoc
cuu dong » cuu cong, cuu tong, cuu long
hoi danh » hop danh, hoi dan, hoc danh
gian dan » gian lang
tu mach » tu cach, tu manh, tu hach
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 mach hoc tap, nghien cuu dong ((luc nhanh) or (luc canh)) chong hoc xa hoi danh gian dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu mach hoc tap, nghien cuu dong ((luc nhanh) OR (luc canh)) chong hoc xa hoi danh gian dan.
• Adding a wildcard symbol may retrieve word variants: tu mach hoc tap, nghien cuu dong ((luc nhanh) or (luc canh)) chong hoc xa hoi danh gian dan*.