Perhaps you should try some spelling variations:
doanh khoa » toan khoa
soc doanh » so doanh, hoa doanh, voi doanh
van thanh » ban thanh, van tuan
sach hoc » cach hoc, sach hoi, mach hoc
khoa hoc » hoa hoc
thanh va » thanh van, hanh va, thanh ha
tu sach » thu sach, su sach, te sach
cuu lon » cuu long, cuc lon, cuu cong
lon soc » long soc, lon suc, lon cuoc
ca thai » chat thai, hoa thai
xa hai » xa thai, xua hai, xa hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach hoc tap, nghien cuu lon soc doanh khoa hoc ((xa hai) or (ca thai)) van thanh va~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach hoc tap, nghien cuu lon soc doanh khoa hoc ((xa hai) OR (ca thai)) van thanh va.
• Adding a wildcard symbol may retrieve word variants: tu sach hoc tap, nghien cuu lon soc doanh khoa hoc ((xa hai) or (ca thai)) van thanh va*.