Perhaps you should try some spelling variations:
doanh khoa » toan khoa
thanh phan » thanh pho, thanh san, thanh toan
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 long » cuu cong, cuu tong, cuu nang
long soc » lon soc, luong suc, cong so
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 long soc doanh khoa hoc ((xa thai) OR (da thai)) van thanh phan~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach hoc tap, nghien cuu long soc doanh khoa hoc ((xa thai) OR (da thai)) van thanh phan".
• Adding a wildcard symbol may retrieve word variants: thu sach hoc tap, nghien cuu long soc doanh khoa hoc ((xa thai) OR (da thai)) van thanh phan*.