Perhaps you should try some spelling variations:
doanh khoa » toan khoa
soc doanh » so doanh, hoa doanh, voi doanh
ban thanh » ban hanh, ban hang
thu mach » thu sach, thuat mach, thu hoach
mach hoc » cach hoc, dich hoc, anh hoc
cuu tong » cuu cong, cuu tinh, huu tung
tong soc » long soc, tong son, tong quoc
khoa hoc » hoa hoc
van tuan » van quan, van ban, anh tuan
ma thai » mai thai, mau thai, ca thai

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thu mach hoc tap, nghien cuu tong soc doanh khoa hoc ma thai ((van tuan) or (ban thanh)) pho~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu mach hoc tap, nghien cuu tong soc doanh khoa hoc ma thai ((van tuan) OR (ban thanh)) pho.
• Adding a wildcard symbol may retrieve word variants: thu mach hoc tap, nghien cuu tong soc doanh khoa hoc ma thai ((van tuan) or (ban thanh)) pho*.