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
thu sach » tu sach, thuat sach, thuoc sach
sach hoc » cach hoc, sach hoi, mach hoc
cuu nang » chuc nang, cam nang, cuu van
nang soc » nang doc, nang hoc, nang som
khoa hoc » hoa hoc
xa thai » ca thai, a thai, xa hai
da thai » dao thai, do 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 sach hoc tap, nghien cuu nang soc doanh khoa hoc ((xa thai) or (da thai)) van thanh san~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach hoc tap, nghien cuu nang soc doanh khoa hoc ((xa thai) OR (da thai)) van thanh san.
• Adding a wildcard symbol may retrieve word variants: thu sach hoc tap, nghien cuu nang soc doanh khoa hoc ((xa thai) or (da thai)) van thanh san*.