Perhaps you should try some spelling variations:
nghien thu » nghiem thuc, nghiep thuc, nghien cuu
nganh khoa » nganh hoa, nganh khong, doanh khoa
tong khoi » xong khoi, tuong khoa, thong khoa
cong nhoi » cong nho, cong noi, cong hoa
thu sach » tu sach, thuat sach, thuoc sach
sach hoc » cach hoc, sach hoi, mach hoc
khoa hoc » hoa hoc
nhan van » nhan dan, nhan va, phan van
va nhan » van nhan, ca nhan, va phan
hoc xa » hoc ma

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