Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
doanh khoa » toan khoa
cuu luong » cuu long, cu luong, cuu tuong
luong suc » luong duc, luong su, duong suc
suc doanh » muc doanh, su doanh, suc manh
sach hoc » cach hoc, sach hoi, mach hoc
khoa hoc » hoa hoc
van tuan » van quan, van ban, anh tuan
tuan van » luan van, tran van, tan van
xa thai » ca thai, a thai, da thai
xa thi » ha thi, ta thi, va thi

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

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