Perhaps you should try some spelling variations:
khong thuoc » khang thuoc, hong phuoc, dong thuoc
nganh khong » nganh cong, nhanh chong, nganh nong
hoc nganh » hoc nhanh
sach toi » sach doi, sach hoi, sach moi
cuu cong » cua cong, thu cong, cac cong
cong hoc » dong hoc, cong hoa, cong coc
thuoc xa » thuoc ma, thuoc va, thuoc la
van nhan » van phan, van thanh, danh nhan
co sach » bo sach, cuon sach, hoc sach
toi tap » toi gap, toan tap, tong tap
va nhan » ca nhan, va phan, va nha

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: co sach toi tap, nghien cuu cong hoc nganh khong thuoc xa hoi ((va nhan) OR (van nhan)) va~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "co sach toi tap, nghien cuu cong hoc nganh khong thuoc xa hoi ((va nhan) OR (van nhan)) va".
• Adding a wildcard symbol may retrieve word variants: co sach toi tap, nghien cuu cong hoc nganh khong thuoc xa hoi ((va nhan) OR (van nhan)) va*.