Perhaps you should try some spelling variations:
luc nhanh » luc nganh, luc canh, luc nhat
chong hoc » chung hoc, chong doc, thong hoc
mach hoc » cach hoc, dich hoc, anh hoc
cuu dong » cuu cong, cuu tong, cuu long
luc nhan » luc nhat, cu nhan, tue nhan
gian dan » gian lang
tu mach » tu cach, tu manh, tu hach
hoi dan » hoa dan, hoc dan, hoi dap
ma hoi » mai hoi, xa hoi, ma hoa

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