Perhaps you should try some spelling variations:
soc doanh » hoa doanh, voi doanh, von doanh
doanh hoa » doanh khoa, doanh hoan, danh hoa
sach hoc » cach hoc, sach hoi, mach hoc
cuu nang » chuc nang, cam nang, cuu van
nang soc » nang doc, nang hoc, nang som
van nhan » van phan, van thanh, danh nhan
tu sach » thu sach, su sach, te sach
ca thai » chat thai, hoa thai
nhan va » nhan tai, nhan dan, nhan tao

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 nang soc doanh hoa hoc ((xa hoi) OR (ca thai)) van nhan va~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach hoc tap, nghien cuu nang soc doanh hoa hoc ((xa hoi) OR (ca thai)) van nhan va".
• Adding a wildcard symbol may retrieve word variants: tu sach hoc tap, nghien cuu nang soc doanh hoa hoc ((xa hoi) OR (ca thai)) van nhan va*.