Perhaps you should try some spelling variations:
khong thuoc » khang thuoc, hong phuoc, dong thuoc
hoc nganh » hoc nhanh
khong hoc » khung hoc, thong hoc, khong chuc
thu sach » tu sach, thuat sach, thuoc sach
sach doi » sach hoi, sach moi, sach dao
cuu dong » cuu cong, cuu tong, cuu long
dong hoc » dong co, dong luc
doi tap » doi tac, doi dap, doi tai
va nhan » van nhan, ca nhan, va phan
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: thu sach doi tap, nghien cuu dong hoc nganh ((khong hoc) or (khong thuoc)) xa hoi va nhan va~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach doi tap, nghien cuu dong hoc nganh ((khong hoc) OR (khong thuoc)) xa hoi va nhan va.
• Adding a wildcard symbol may retrieve word variants: thu sach doi tap, nghien cuu dong hoc nganh ((khong hoc) or (khong thuoc)) xa hoi va nhan va*.