Perhaps you should try some spelling variations:
nganh khoa » nganh hoa, nganh khong, doanh khoa
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 hoc » nang doc, nang luc, dong hoc
van phan » van phong, van thanh, luan phan
hoi van » hoi va, hoi dan, hai van
phan va » phan van, nhan va, han va
hoc xa » hoc ma
toan » tran

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 hoc ((nganh khoa) or (toan khoa)) hoc xa hoi van phan va~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach hoc tap, nghien cuu nang hoc ((nganh khoa) OR (toan khoa)) hoc xa hoi van phan va.
• Adding a wildcard symbol may retrieve word variants: thu sach hoc tap, nghien cuu nang hoc ((nganh khoa) or (toan khoa)) hoc xa hoi van phan va*.