Perhaps you should try some spelling variations:
nhanh khong » nganh khong, nhan khong, nhanh hong
nhanh chong » thanh cong, khanh phong
thuoc dai » thuoc tai, thuoc dac, thuoc sai
dan thanh » dang thanh, danh thanh, ban thanh
thanh van » thanh san, thanh toan, thanh phan
mach hoc » cach hoc, dich hoc, anh hoc
tu mach » tu cach, tu manh, tu hach
dai hoi » dai hoc, dai hai, dai moi
hoi dan » hoa dan, hoc dan, hoi dap
mo hoc » mon hoc, co hoc

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 mo hoc ((nhanh khong) OR (nhanh chong)) thuoc dai hoi dan thanh van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu mach hoc tap, nghien cuu mo hoc ((nhanh khong) OR (nhanh chong)) thuoc dai hoi dan thanh van".
• Adding a wildcard symbol may retrieve word variants: tu mach hoc tap, nghien cuu mo hoc ((nhanh khong) OR (nhanh chong)) thuoc dai hoi dan thanh van*.