Perhaps you should try some spelling variations:
thuoc sach » nuoc sach, thuat sach, thuoc sinh
nghien thu » nghiem thuc, nghiep thuc, nghien cuu
cac nganh » hoc nganh
nganh hoa » thanh hoa, khanh hoa, danh hoa
hoc sach » hoc sinh, hoc cac, hoc anh
cong cac » cuong cac, cong tac, cong cau
cau nhan » chau nhan, ca nhan, cu nhan
hoi cau » hoi chu, hoc cau, hoa cau
nhan va » nhan tai, nhan dan, nhan tao
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: ((thuoc sach) or (hoc sach)) hoc tap, nghien thu cong cac nganh hoa hoc xa hoi cau nhan va~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuoc sach) OR (hoc sach)) hoc tap, nghien thu cong cac nganh hoa hoc xa hoi cau nhan va.
• Adding a wildcard symbol may retrieve word variants: ((thuoc sach) or (hoc sach)) hoc tap, nghien thu cong cac nganh hoa hoc xa hoi cau nhan va*.