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nghien huu » nghien cuu, nguyen huu, nhiem huu
cach thoi » cac thoi, cach thuc, cach noi
tuong hoc » truong hoc, duong hoc, tuong khoa
hoc nganh » hoc nhanh
dan toan » van toan, dan than, manh toan
tuong ho » tong hop
toan tai » toan tap, doanh tai, toan ban
tuan hoc » toan hoc, luan hoc, than hoc
huu tuan » huu han, huu tung
thoi tap » toi tap, hoc tap, thoi dai
hoi dan » hoa dan, hoc dan, hoi dap
so cach » so sach, co cach, loi cach