Perhaps you should try some spelling variations:
khong thuoc » khang thuoc, hong phuoc, dong thuoc
nhanh khong » nhanh chong, nganh khong, nhan khong
hoc nhanh » hoc nganh, hoc phan
sach doi » sach hoi, sach moi, sach dao
cuu dong » cuu cong, cuu tong, cuu long
dong hoc » dong co, dong luc
thuoc xa » thuoc ma, thuoc va, thuoc la
te sach » toc sach
doi tap » doi tac, doi dap, doi tai
va nhan » van nhan, ca nhan, va nha
va phan » van phan, va phat, va phap

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

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