Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
nghien thu » nghiem thuc, nghiep thuc, nghien cuu
nganh khoa » nganh hoa, nganh khong, doanh khoa
hoc nganh » hoc nhanh
thu sach » tu sach, thuat sach, thu hoach
cong hoc » dong hoc, cong hoa, cong coc
khoa hoc » hoa hoc
van nhan » van phan, van thanh, danh nhan
nhan van » nhan dan, nhan va, phan van
hai van » thai van, ha van, hai tan
hoc xa » hoc ma
xa hai » xa thai, xua hai, xa hoi

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