Perhaps you should try some spelling variations:
doanh khoa » toan khoa
soc doanh » so doanh, hoa doanh, voi doanh
tuan phan » luan phan, toan phan, tuan pham
thu sach » tu sach, thuat sach, thuoc sach
sach hoc » cach hoc, sach hoi, mach hoc
cuu cong » cua cong, thu cong, cac cong
cong soc » cong so, cong suc, cong coc
khoa hoc » hoa hoc
van tuan » van quan, van ban, anh tuan
xa thai » a thai, da thai, xa hai
ca thai » chat thai, hoa 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 cong soc doanh khoa hoc ((xa thai) OR (ca thai)) van tuan phan~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach hoc tap, nghien cuu cong soc doanh khoa hoc ((xa thai) OR (ca thai)) van tuan phan".
• Adding a wildcard symbol may retrieve word variants: thu sach hoc tap, nghien cuu cong soc doanh khoa hoc ((xa thai) OR (ca thai)) van tuan phan*.